There are two types of auxiliary verb.
1) Primary Auxiliary
2) Modal Auxiliary
1) Primary Auxiliary : Different form of primary auxiliary is used in different tenses, with different persons.
There are 5 Primary Auxiliaries.- Be, Do, Have, Shall, Will
Different forms of -
1) Primary Auxiliary : 1) Be - Present -am, is, are
Past - was, were
Future - shall be, will be
2) Have - Present - have, has
Past - had,
Future - shall have, will have
3) Do - Present - do, does
Past - did
Future - shall do, will do
2) Modal Auxiliary : Modal Auxiliary is used to indicate Mood or Attitude of the speaker.
There are 15 Modal Auxiliaries.- Can, Could, Will, Would, Shall, Should, May, May not, Might, Must, Have to,Used to, Need to, Ought to,Dare to.
Modal Auxiliary Mood/Attitude
1) Can ability
2) Could past ability
3) Shall determination
4) Should advice,suggestion
5) Will certainty
6) Would habitual action in past
7) May permission,less certainty
8) May not prohibition
9) Might possibility, probability
10) Must obligation, compulsion
11) Have to obligation, compulsion
12)Ought to obligation, compulsion
13) Used to habitual action in past
14) Need to need ,necessity
15) Dare to daring, courage
In Mind Mapping Form -
PRACTICE:
Do as directed:
1) He is able to sing. (Use a modal auxiliary showing 'ability')
2) She could write well. (Use 'be able to' and rewrite)
3) You have to wear mask everyday.( Use a modal auxiliary showing 'suggestion')
4) It .......rain today. (Fill in the blank with a suitable auxiliary showing 'possibility')
5) It's your duty to obey your parents and teachers.(Use a modal auxiliary showing 'obligation')