Question

It must be rational modal auxiliary​

Answer 1

Answer:

Auxiliary verbs

A verb which helps another verb with respect to formation of its tense, voice or specific meaning is known as an auxiliary verb.

Auxiliary verb are of two types: Primary Auxiliary Verbs and Model Auxiliary Verbs.

Primary Auxiliary Verb

Functions

To be: am, is are, was, were, shall, will, being, been

Formation of the progressive tense, passive voice.

To have: have, has, had,

Formation of the perfect tense

To do: do, does, did

Formation of interrogation and negation, emphasis, request, invitation

Examples:

1. They are enjoying themselves in the garden. (Progressive tense)

2. The car was being repaired by the man. (Passive voice)

3. The computer has completed its task. (Perfect tense)

4. Do you know that? (Interrogation)

5. I did not buy any papers today. (Negation)

6. We did check all the cabin. (Emphasis)

7. Do come with me to the cinema. (Request)

Model Auxiliary Verb

Function

Can

Ability, Informal permission, possibility

Could

Ability, Informal permission, possibility

May

Formal permission, possibility, expression of wish

Might

Formal permission, possibility

Shall

Future action, command, compulsion, formal request

Will

Future action, determination, threat, promise intension, wish, invitation.

Should

Duty/ obligation, advice, condition approval.

Would

Habitual action, polite request, wish, refusal, determination, invitation.

Must

Compulsion, determination, duty/obligation.

Ought

Moral obligation, advice

Dare

Courage

Need

Necessity

Have to

Compulsory obligation

༒Hope Its Help U〠

Answer 2

Answer:

Modals are can, could, may, might, must, ought to, shall, should, will, would and need (need can also be a main verb). Examples: We can play football. We could play football.