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Look at the picture and identify the modal verbs.

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What are modal verbs?

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Define modal verb: A modal verb is a type of auxiliary verb that expresses possibility or necessity.

A modal verb is a helping (auxiliary) verb that expresses ability, possibility, permission, or obligation. The modal verb must be used in a verb phrase.

A verb phrase is more than one verb used in together to express an action. Modal verbs are always paired with at least one other verb.

Modal verbs express possibility or necessity (and variations thereof).

What are the English modal verbs? Here are nine most frequently used modal verb in Modern English.
Example of Modal Verbs in Use:

Shane can swim.
"Can" is the modal verb in the verb phrase "can swim."

Suzy could sing if she tried.
"Could" is the modal verb in the verb phrase "could sing."

You must attend our wedding.
"Must" is a modal verb; "must attend" is the verb phrase.

Since modal verbs are helping verbs, they are always a part of a verb phrase. They do not stand alone as individual verbs.

Modal helping verbs are still helping verbs, so they must be used in a verb phrase ( helping verb plus main verb) in order to be grammatically correct.
Example of Modal Verb in Use:

Joe should try.

"Should" is the modal verb in the verb phrase "should try."

"Try" is actually the main verb, stating what action Joe should take.

Modal verbs can be made negative, as well. The negative word "not" is added into the verb phrase between the modal verb and the main verb.

To make a negative verb phrase with a modal verb:

modal verb + not + main verb
Examples of modal verb in use (negative):

Sandy will not go to the theater.

"will not go" is the verb phrase

"will" is the modal verb

"go" is the main verb

"not" is placed between the modal verb and the main verb to make the negative verb phrase

Jake must not make a mistake.

"must not make" is the verb phrase

"must" is the modal verb

"make" is the main verb

"not" is placed between the modal verb and the main verb to make the negative verb phrase

Again, the modal verbs are,

These modal verbs are used to express different meanings of possibility and intention. They enhance the meanings of main verbs, and certain verbs are used to express each meaning.

Certain modal verbs express possibility. They express something that may or may not happen.

The modal verbs used to express possibility include: can, could, might, may.
Examples:
Certain modal verbs express intention. They express something that the speaker plans to do but has not yet completed.

The modal verbs used to express intention include: should, would, might, will, shall.
Examples:

She should share.

She would share if you let him.

She might share.

I will share.

I shall share.

Certain modal verbs express obligation. They express something that the speaker plans needs to do.

The modal verbs used to express obligation include: will, must, shall.
Examples:
Certain modal verbs express necessity. They express something that the speaker plans needs to do.

The modal verbs used to express necessity include: must, shall.
Examples:
Since modal verbs are not the main verb in a sentence, they are not conjugated or inflected to show grammatical changes in the subject. Put differently, they do not change forms.

Furthermore, modal verbs do not have an infinitive form to conjugate.
Modal verbs with different subjects:

I can/could/may/might/must/shall/should/will/would

You can/could/may/might/must/shall/should/will/would decide.

He/She/It can/could/may/might/must/shall/should/will/would decide.

We can/could/may/might/must/shall/should/will/would decide.

You can/could/may/might/must/shall/should/will/would decide.

They can/could/may/might/must/shall/should/will/would decide.

As you can see, the same verbs work with subjects in the first, second, and third persons.

Define modal verb: the definition of modal verb is a specific kind of helping verb used to express possibility.

In summary, a modal verb:

is a helping verb

must be used with a main verb

is always a part of a verb phrase

can be made negative

does not change forms for different subjects

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What is a Modal Verb? English Modal Verbs List - Writing Explained

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Define modal verb: A modal verb is a type of auxiliary verb that expresses possibility or necessity. A modal verb is a helping (auxiliary) verb that expresses ability, possibility, permission, or obligation. The modal verb must be used in a verb phrase. A verb phrase is more than one verb used in together to express an action.

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Watch the video and analyze it.

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Modal Verbs | MUST CAN WOULD SHOULD MIGHT WILL COULD SHALL MAY