Auxiliaries & Modals

Auxiliaries :

Is a "helping verb" used to make the form of another verb.

Verbs used with ordinary verbs to make tenses, passive forms, questions and negatives are called auxiliary verbs or auxiliaries.

The verbs can, could, may, might, will, would, shall, should, must and ought are called modal verbs or modals. They are used before ordinary verbs and express meanings such as permission, possibility, certainty and necessity. Need and dare can sometimes be used as modal verbs.

e.g.:-
1. He is working and I am writing. (Tense)
2. The gate was opened (Passive form)
3.Does he work at Microsoft?
4. They don’t have to go.

Modals
e.g.:-
1. May I close the door please?(Permission)
2. Pakistan might win the match. (Possibility)
3. I will get full marks in English.(Certainty)
4. You must improve your spelling. (Necessity)