Do is not used:1. With
be (except imperatives):
Were you late?
Is he walking now?But:
Don't be a fool!2. With the defective auxiliaries (can, could; will, would, shall, should; may, might, must; ought):
Can he swim?
Will they come as well?
Would you have said that?
3. With
have, has, had when they are perfect and past perfect auxiliaries:
Have you seen him?
Had he done anything?Do need not be used with the above verbs when they mean 'own', 'possess':
Has he a car? It is more common, especially in American English, to use
do:
Does he have a car?When
have has another meaning,
do must be used:
What time did you have lunch today? (= eat)
Do you have to go there every week? (= must)
Does he have his house painted every year? (= someone does the job for him)
4. When an
interrogative pronoun is the subject or a part of the subject of a clause:
Who said that?
Whose friend said that?
What happened?CB