Modal Verbs Notes

Modal Verbs

What are Modal Verbs?

Modal verbs are special helping verbs used with main verbs to show abilities, possibilities, permissions, or necessities.
Examples: can, could, may, might, will, would, shall, should, must, ought to

What are Modal Verbs Used For?

Modal verbs express meanings like permission, possibility, certainty, and necessity.
Examples: You may go or It might rain.

Characteristics of Modal Verbs

Always followed by the base form of the main verb (e.g., He can go.).
Do not change form (no -s, -ing, or past participle).

Common Modal Verbs

Can / Could
May / Might
Shall / Should
Will / Would
Must / Ought to

Can Usage

Expresses ability, capacity, or permission.
- Examples:
  - I can swim across the river. (Ability)
  - Can you lift this box? (Capacity)
  - You can go now. (Permission, informal)

Could Usage

Expresses past ability, polite requests, or possibility.
- Examples:
  - I could swim across the river when I was young. (Past ability)
  - Could you help me with this? (Polite request)
  - She wondered whether it could be true. (Possibility)

May Usage

Expresses formal permission, possibility, or a wish.
- Examples:
  - May I borrow your umbrella? (Formal permission)
  - It may rain tomorrow. (Possibility)
  - May success attend you! (Wish, very formal)

Might

Might is the past equivalent of may.
- Example: I thought he might be at home. (Possibility)

Differentiation Table

Modal Verb	Certainty Level	Explanation	Example
Can	High certainty	Indicates something is definitely possible under normal conditions.	It can rain in this season.
May	Moderate certainty	Suggests something is likely to happen, but not guaranteed.	It may rain later today.
Could	Low to moderate certainty	Refers to something that is possible, often in a hypothetical sense.	It could rain if the clouds gather.
Might	Low certainty	Suggests something is less likely to happen, with more hesitation.	It might rain, but it looks unlikely.

Practice

I __ eat an entire pizza by myself, but I might regret it later.
I _ marry the person of my choice.
Pakistan __ become a superpower by 2097.

Shall

Meaning: Used in older English to indicate future action, commands, promises, or threats.
Modern Usage: Rare, replaced by will for most contexts.

Shall Examples:

Shall I open the door? (i.e., Do you want me to open it?)
Which pen shall I buy? (i.e., What is your advice?)
Where shall we go? (What is your suggestion?)

Should

Meaning: Expresses duty, obligation, advice, supposition, or probability.
- Examples:
  - You should keep your promise. (Obligation)
  - He should be in the library now. (Probability)
  - You should have been more careful. (Unfulfilled past obligation)

Will

Expresses future action, willingness, determination, habitual action, or probability.
- Examples:
  - I will help you. (Willingness)
  - I will succeed or die trying. (Determination)
  - He will talk about nothing but films. (Habit)

Would

Past form of will, polite requests, past habits, or wishes.
- Examples:
  - She said she would carry my books. (Future in the past)
  - He would sit for hours listening to the wireless. (Past habit)
  - Would you lend me your scooter? (Polite request)
  - I wish you would not chatter so much. (Strong desire)

Must

Used to express necessity.
- Examples:
  - You must do well in the exam.
  - You must get up early.
Must has no past form.
Must is used for logical certainty as well.
- Examples:
  - We must get up early.
  - Yesterday we had to get up early.
  - Yesterday we must get up early.

Identify the Difference

I must go on a diet.
I have to go on a diet.

Ought to

Ought (to) expresses moral obligation or desirability
- Examples:
  - We ought to love our neighbors.
  - We ought to help him.
  - You ought to know better.