Slide 1 of 45

Verbs, Mood, Modals & Tenses

All Things Verbal

Master the building blocks of English grammar

Table of Contents

1
Verbs
Slides 3–13
2
Mood
Slides 14–22
3
Modals
Slides 23–34
4
Tenses
Slides 35–43
5
Summary & Thank You
Slides 44–45

VERBS

What verbs are, types, forms, and common mistakes

What Are Verbs?

Definition:

Words that show action, state, or occurrence

Functions:

Predicate core, agree with subject, mark tense/aspect/voice

Examples:

run, think, become, is, seem, happen

"The children play in the park every day."

"She is writing a novel about her experiences."

Action Verbs

Physical:

Verbs describing observable actions: run, jump, build, write, swim, dance

"She writes daily in her journal."

"They built a new house last summer."

Mental:

Verbs describing cognitive activities: think, decide, remember, consider, imagine

"I think this solution will work."

"They solved the puzzle after hours of concentration."

Key Features:

  • Express dynamic activities rather than states
  • Can form progressive tenses (is running, was thinking)

Linking Verbs

Common:

be, seem, become, appear, remain, feel, look, sound, taste, smell

Function:

Link subject to subject complement (predicate noun or adjective)

Examples:

The soup smells delicious. / He became a pilot.

"She is happy." (links subject to adjective)

"The cake tastes sweet." (sensory linking verb)

"The situation remains uncertain." (state of being)

Helping (Auxiliary) Verbs

Primary:

be, have, do

"She is studying." / "They have finished." / "Do you know?"

Modals:

can, could, may, might, will, would, shall, should, must, ought to

"She can swim." / "He might arrive late." / "You must complete the task."

Functions:

Form questions, negatives, tenses, voice, and express modality

Question: "Will you attend?" / Negative: "She does not agree." / Perfect tense: "I have seen it."

Transitive vs Intransitive

Transitive Verbs

Definition:
Verbs that require a direct object to complete their meaning

Examples:

  • She kicked the ball.
  • They built a house.
  • I sent an email.

Test:
Ask "What?" or "Whom?" after the verb
She kicked (what?) the ball.

Intransitive Verbs

Definition:
Verbs that do not require a direct object to complete their meaning

Examples:

  • The baby slept.
  • She arrived late.
  • The sun rises in the east.

Often followed by:
Adverbs or prepositional phrases (not objects)
She laughed loudly (adverb).
They arrived at noon (prep. phrase).

Regular vs Irregular Verbs

Regular Verbs:

Add -ed/-d to form past tense and past participle

work → worked → worked

talk → talked → talked

Irregular Verbs:

Change form in unpredictable ways

go → went → gone

buy → bought → bought

swim → swam → swum

Memorization Tip:

Group irregular verbs by similar patterns

  • drink/drank/drunk, sing/sang/sung, swim/swam/swum
  • build/built, send/sent, spend/spent

Finite vs Non-finite Verbs

Finite Verbs:

Show tense and agree with subject in number and person

"She walks to school every day." (present tense, 3rd person singular)

"They were singing when I arrived." (past continuous, 3rd person plural)

Non-finite Verbs:

Do not show tense or agree with subject in number

"to walk" (infinitive), "walking" (gerund/present participle), "walked" (past participle)

Roles of Non-finite Forms:

  • Infinitives function as nouns: "To swim is fun." (subject)
  • Gerunds function as nouns: "Swimming improves health." (subject)
  • Participles function as adjectives: "The broken vase..." (past participle)

Phrasal Verbs

Structure:

Verb + particle (preposition or adverb): look up, turn off, give in, run into

Meanings:

Often idiomatic: meaning differs from individual words

  • look up (search) ≠ look + up
  • give in (yield) ≠ give + in

Examples:

Common phrasal verbs in sentences

"Please turn off the lights before you leave."

"We ran into an old friend at the mall yesterday."

"I need to look up this word in the dictionary."

Verb Forms

Base Form

walk
→ original form
eat
→ dictionary entry
go
→ after "to"

3rd Person Singular

walks
→ add -s/-es
eats
→ present tense
goes
→ for he/she/it

Past Form

walked
→ regular (-ed)
ate
→ irregular
went
→ irregular

Past Participle

walked
→ same as past
eaten
→ after has/have/had
gone
→ for perfect tenses

Present Participle

walking
→ add -ing
eating
→ continuous tenses
going
→ also as noun

To-Infinitive

to walk
→ to + base form
to eat
→ as subject/object
to go
→ express purpose

Usage Pattern: Regular verbs follow predictable patterns, while irregular verbs have unique forms. All verb forms derive from the base form and are used in specific grammatical contexts.

Common Verb Mistakes

Subject-Verb Agreement

❌ Incorrect

The data is conclusive on this point.

✓ Correct

The data are conclusive on this point.

"Data" is technically plural (singular: datum), requiring plural verb in formal/scientific writing.

Tense Shift Errors

❌ Incorrect

He goes to the store and then left.

✓ Correct

He went to the store and then left.

Maintain consistent tense throughout a narrative unless there's a specific reason to switch.

Transitivity Confusion

❌ Incorrect

Let's discuss about the plan.

✓ Correct

Let's discuss the plan.

"Discuss" is transitive and takes a direct object without a preposition.

MOOD

Indicative, imperative, subjunctive, conditional

What Is Grammatical Mood?

Definition:

Speaker's attitude toward the proposition or statement

Expresses how the speaker views the reality, possibility, or necessity of an action

Core Moods:

  • Indicative: Facts, reality, questions (She teaches math.)
  • Imperative: Commands, requests, instructions (Close the door.)
  • Subjunctive: Wishes, hypotheticals, demands (I wish I were taller.)
  • Conditional: If-then situations, possibilities (If it rains, we'll stay home.)

Indicative Mood

Use:

  • Statements of fact or reality
  • Questions seeking information
  • Expressing opinions or beliefs

Examples:

She teaches math at the university.

Statement of fact

Do they agree with the proposal?

Question seeking information

It probably rains tomorrow.

Opinion or prediction

Imperative Mood

Use:

  • Commands, requests, instructions
  • Subject "you" is implied (not stated)
  • Forms with base form of verb (no -s endings)

Examples:

Commands: "Stop talking." / "Open the door."

Polite requests: "Please take a seat." / "Kindly wait here."

Instructions: "First, mix the ingredients. Then, bake for 30 minutes."

"Don't be late." (negative imperative with 'don't')

"Let's begin." ('let's' for inclusive suggestions)

Subjunctive: Wishes & Hypotheticals

Wishes (Contrary to Reality):

Express desires about situations that are untrue or unlikely

"I wish I were taller." (But I am not tall)

"She wishes she had more time." (But she doesn't)

Hypothetical Situations:

Describe imaginary or contrary-to-fact conditions

"If I were you, I would apply for the job." (I am not you)

"She acts as though she were the manager." (She isn't)

Form:

Use base verb after if/that in certain patterns; 'be' becomes 'be/were' for all persons

"The teacher insisted that he submit the assignment." (not submits)

"I wish he were here." (not was, for all persons including singular)

Subjunctive: Suggestions & Demands

Triggers:

suggest, recommend, insist, demand, essential that...

Form:

that + subject + base verb

Examples:

They insisted that he leave.

"I suggest that she be informed of the decision."

"The committee demands that the proposal be reviewed immediately."

"It is essential that everyone arrive on time."

Conditional Mood (If-Clauses)

Zero Conditional:

If + present simple, present simple (general truths/facts)

If water boils, it turns to steam.

First Conditional:

If + present simple, will + infinitive (likely future)

If it rains, we will cancel the picnic.

Second Conditional:

If + past simple, would + infinitive (unlikely/hypothetical)

If I won the lottery, I would travel the world.

Third Conditional:

If + past perfect, would have + past participle (impossible past)

If I had seen you, I would have waved.

Mixed Conditional:

Combinations of different conditionals (mixed time references)

If I were taller (present/general), I would have reached it (past).

Mood Comparison Chart

Mood Type Same Idea Different Forms
Indicative He is late.
States a fact or reality
Imperative Be on time.
Gives a command or instruction
Subjunctive I insist that he be on time.
Expresses wishes, demands, or hypothetical situations
Conditional If he were on time, we would start now.
Describes what would happen under certain conditions

Common Mood Errors

Subjunctive in Hypotheticals

❌ Incorrect

If I was you, I would apply for that job.

✓ Correct

If I were you, I would apply for that job.

Use "were" (not "was") in hypothetical/counterfactual conditions with "if" clauses.

Subjunctive in Demands

❌ Incorrect

They demanded that he leaves immediately.

✓ Correct

They demanded that he leave immediately.

After verbs like "demand," "suggest," "insist," "recommend," use the base form of the verb (no -s ending).

Imperative Formation

❌ Incorrect

Please to sit down and wait your turn.

✓ Correct

Please sit down and wait your turn.

Imperative mood uses the base form of the verb without "to." Never combine "please" with the infinitive.

MODALS

Meaning, nuance, politeness, certainty

What Are Modal Verbs?

List:

can, could, may, might, will, would, shall, should, must, ought to, have to (semi-modal)

Features:

  • No -s in 3rd person singular (he can, not he cans)
  • Always followed by base verb form without 'to' (except ought to)
  • Express ability, permission, obligation, possibility, prohibition

Examples:

She can speak three languages. (ability)

You must finish this by tomorrow. (obligation)

"It might rain later." (possibility)

"Would you help me with this?" (polite request)

Can / Could

Ability:

She can swim. (present ability)

When I was 10, I could swim far. (past ability)

"I can speak three languages fluently."

Permission:

Can I leave early? (informal)

Could I leave early? (more polite)

"Students can use calculators during the exam."

Possibility:

It can get noisy. (general possibility)

That could be true. (less certain)

"Temperatures in the desert could drop below freezing at night."

May / Might

Possibility:

It may/might rain later (might = lower probability)

"The economy may improve next year."

"She might not come to the party."

Permission (formal):

May I come in?

"May I ask a question?"

"May we proceed with the presentation?"

Hedging:

That may be challenging.

"I might suggest a different approach."

"This solution may not be ideal for everyone."

Will / Would

Future:

Used to express future actions or states

"I will call you tomorrow."

Willingness:

Shows agreement or voluntary action

"Don't worry, I'll help you move this weekend."

Polite Requests:

Would is used to make polite requests and offers

"Would you mind opening the window?"

Hypotheticals:

Would expresses conditional results and imaginary situations

"I would travel more if I had time."

Shall / Should

Shall:

Used for offers and suggestions (mainly in British English)

"Shall we dance?" (offering/suggesting an activity)

"Shall I open the window for you?" (offering help)

Should:

Expresses advice, recommendation, or expectation

"You should see a doctor about that cough." (advice)

"The train should arrive by 6 pm." (expectation)

Formal Usage:

"Shall" appears in legal/official documents to indicate obligation

"The parties shall maintain confidentiality." (legal requirement)

Must / Have to

Must:

Internal/strong obligation (speaker's authority or conviction)

"You must wear a helmet when riding a motorcycle."

"I must finish this report by tomorrow."

Have to:

External requirement (rules, laws, circumstances)

"I have to submit the form by Friday." (company policy)

"She has to take the train because her car broke down."

Deduction:

"Must" for logical conclusion with strong certainty

"The lights are on. He must be home now."

"You've been working for 10 hours. You must be exhausted!"

Ought to

Advice/moral duty:

You ought to apologize.

"We ought to consider the environmental impact of our decisions."

Near-synonym of 'should':

Slightly stronger/formal than 'should'

"You should help your brother." (advice)

"You ought to help your brother." (stronger moral obligation)

Negation:

ought not to (oughtn't to)

"You ought not to speak to your teacher that way."

"They oughtn't to have left without saying goodbye."

Degrees of Certainty (Modals)

Certainty Level Modal Verbs Examples
100% Certainty must "She must be at home now." (deduction)
Strong certainty based on available evidence
80-90% Certainty should / ought to "They should arrive by 5 pm."
High probability but not absolute certainty
50-70% Certainty will / would / may "It will probably rain tomorrow."
"That may be correct."
Moderate probability or likelihood
< 50% Certainty might / could "He might come to the party."
"It could rain later."
Lower possibility or potential
Impossibility can't / couldn't "That can't be true!"
"He couldn't have finished already."
Expresses that something is not possible

Polite Requests with Modals

More Direct

Can you send the file?

Most direct form - common in casual conversations and everyday workplace communication.

Could you send the file?

More polite than "can" - suggests you're asking for a favor rather than making a demand.

Would you mind sending the file?

Significantly more formal - often used in professional emails and when speaking to superiors.

More Formal

May I request the file?

Highest level of formality - appropriate for very formal situations and official correspondence.

Negative Modals

Mustn't vs Don't have to:

Mustn't (prohibition) = not allowed to do something

Don't have to (no necessity) = allowed not to do something

"You mustn't enter this area." (forbidden)

"You don't have to come if you're busy." (optional)

Can't (Impossibility):

Expresses impossibility or strong belief something is not true

"That can't be true." (I strongly believe it isn't true)

"He couldn't have finished already." (It's impossible)

Shouldn't (Advice):

Expresses advice against something or mild obligation not to do

"You shouldn't skip meals." (It's not good for your health)

"Children shouldn't stay up late." (It's not advisable)

Common Modal Mistakes

Adding "to" After Modals

❌ Incorrect

He can to swim very fast.

✓ Correct

He can swim very fast.

Modal verbs are followed directly by the base form of the main verb (without 'to').

Incorrect Modal Negation

❌ Incorrect

She doesn't must go to the meeting.

✓ Correct

She doesn't have to go to the meeting. / She mustn't go to the meeting.

"Doesn't have to" means no obligation (not necessary); "mustn't" means prohibition (not allowed).

Verb Inflection After Modals

❌ Incorrect

He will comes to the party tomorrow.

✓ Correct

He will come to the party tomorrow.

Modal verbs are always followed by the base form of the verb, never an inflected form (-s, -ed, -ing).

TENSES

12 tenses + timelines, signals, sequencing

Tenses Overview

Time Period Simple Continuous Perfect Perfect Continuous
Present Present Simple
I work
Facts, routines, habits
Present Continuous
I am working
Actions in progress now
Present Perfect
I have worked
Past actions with present relevance
Present Perfect Continuous
I have been working
Ongoing action started in past until now
Past Past Simple
I worked
Completed actions in the past
Past Continuous
I was working
Action in progress at a past time
Past Perfect
I had worked
Action completed before another past action
Past Perfect Continuous
I had been working
Ongoing action before another past action
Future Future Simple
I will work
Actions or states in the future
Future Continuous
I will be working
Action in progress at future time
Future Perfect
I will have worked
Action completed before future time
Future Perfect Continuous
I will have been working
Ongoing action before future time

Present Tenses (with Timeline)

Past Recent Past NOW Future

Simple Present

I work at a university.

(routines, habits, general truths, permanent situations)

Present Continuous

I am working on a project right now.

(actions happening now, temporary situations, future arrangements)

Present Perfect

I have worked on many projects.

(past → present result, experience, recent actions, unfinished time periods)

Present Perfect Continuous

I have been working on this project for three months.

(duration to now, emphasis on continuity, temporary situations up to now)

Past Tenses (with Timeline)

Earlier Past Past Recent Past NOW

Past Simple

I worked at a university last year.

(completed actions in the past, sequence of events, habits in the past)

Past Continuous

I was working when you called.

(actions in progress at a specific time in the past, background actions)

Past Perfect

I had worked there before I moved to London.

(past before past, actions completed before another past event)

Past Perfect Continuous

I had been working on the project for six months before it was canceled.

(duration before a time in the past, emphasis on continuity up to a past point)

Future Tenses (with Timeline)

NOW Near Future Future Reference Distant Future

Future Simple

I will work / am going to work on this project.

(predictions, decisions, plans, promises, offers)

Future Continuous

This time tomorrow, I will be working on the presentation.

(actions in progress at a specific future time, predicted activities)

Future Perfect

By next month, I will have worked here for five years.

(actions completed before a specific future time, looking back from future point)

Future Perfect Continuous

By June, I will have been working on this project for a year.

(duration up to a future point, emphasizes ongoing process and duration)

Tenses Comparison Chart

Type Present Past Future
Simple
Habits, facts
S + V(s) + O
I work every day.
S + V(ed/2) + O
I worked yesterday.
S + will/be going to + V + O
I will work tomorrow.
Continuous
In progress
S + am/is/are + V-ing
I am working now.
S + was/were + V-ing
I was working at 5pm.
S + will be + V-ing
I will be working at 8pm.
Perfect
Completed
S + have/has + V(ed/3)
I have worked here since 2020.
S + had + V(ed/3)
I had worked before they arrived.
S + will have + V(ed/3)
I will have worked 10 hours by 6pm.
Perfect Continuous
Duration
S + have/has been + V-ing
I have been working for 3 hours.
S + had been + V-ing
I had been working for 3 hours when they called.
S + will have been + V-ing
I will have been working for 10 hours by then.

Signal Words for Tenses

Present Tenses:

  • Simple: always, usually, often, sometimes, never, every day/week/year
  • Continuous: now, at the moment, currently, at present, these days
  • Perfect: already, yet, ever, never, just, since, for, so far
  • Perfect Continuous: since, for, all day/week, lately, recently

Past Tenses:

  • Simple: yesterday, last night/week/month/year, ago, in 2019, when
  • Continuous: while, when, at this time yesterday, all day/night

Past Tenses (continued):

  • Perfect: before, after, already, by then, by the time
  • Perfect Continuous: for, since, before, until then

Future Tenses:

  • Simple: tomorrow, next week/month/year, in 2030, soon, in the future
  • Continuous: this time tomorrow, at 8pm tonight, during
  • Perfect: by, by then, by the time, before
  • Perfect Continuous: for, by then, for...by

Common Tense Errors

Stative Verbs in Continuous Form

❌ Incorrect

I am knowing the answer to that question.

✓ Correct

I know the answer to that question.

Stative verbs (know, believe, love, have) typically don't take continuous forms as they describe states rather than actions.

Double Past in Negative Forms

❌ Incorrect

He didn't went to the meeting yesterday.

✓ Correct

He didn't go to the meeting yesterday.

With auxiliary "did/didn't," use the base form of the verb (not past tense) as "did" already indicates past time.

Present Simple vs Present Perfect for Duration

❌ Incorrect

I live here since 2019.

✓ Correct

I have lived here since 2019.

Use present perfect (not simple present) with "since" and "for" to describe actions starting in the past and continuing to the present.

Sequence of Tenses

Backshift in Reported Speech

The Rule:
When converting direct speech to reported speech with a past reporting verb, tenses typically move one step back in time

Tense Changes:

  • Present Simple → Past Simple
  • Present Continuous → Past Continuous
  • Present Perfect → Past Perfect
  • Past Simple → Past Perfect

Examples:

"I am tired" → He said (that) he was tired.

"We have finished" → They told me they had finished.

"I went there yesterday" → She said she had gone there the day before.

Time Consistency in Narratives

The Rule:
Maintain consistent tense throughout a narrative unless there's a logical reason to shift

Key Principles:

  • Main narrative → Same tense frame
  • Flashbacks → Earlier tense
  • Future events → Modal or future tense
  • Background → Past perfect (in past narratives)

Exception: Universal Truths

Universal truths and facts may remain in present tense even in past narratives:

She explained that the Earth revolves around the Sun.

The professor wrote that water boils at 100°C.

Summary & Quick Reference

Verbs

  • Action, linking, and helping verbs form predicate cores
  • Transitive verbs need objects; intransitive don't
  • Regular verbs add -ed; irregular change forms
  • Verb forms: base, 3rd person, past, participle, gerund

Mood

  • Indicative: facts and questions (He is late)
  • Imperative: commands and instructions (Be on time)
  • Subjunctive: wishes, demands (I wish he were here)
  • Conditional: if/then situations (If it rains, we'll stay)

Modals

  • Express ability, permission, obligation, possibility
  • No -s form; always followed by base verb
  • Degree of certainty: must > should > may > might
  • Politeness scale: would, could > can, will

Tenses

  • 12 forms across 3 time periods (present, past, future)
  • Simple: habits, facts; Continuous: in progress
  • Perfect: completed; Perfect Continuous: duration
  • Maintain consistent tense unless reason to shift

Pro Tip

Choose tense/aspect for time + completeness; choose modal for stance. When confused about which form to use, identify your purpose first: are you describing when something happens (tense), or your attitude toward it (mood/modal)?

Thank You

Thank you for exploring the world of verbs, mood, modals, and tenses with us. We hope this presentation enhances your understanding of English grammar.

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