Auxiliaries here are used both alone and as part of various tenses of ordinary verbs.
Read the following (a) in the negative (b)in the interrogative. These sentences, except
for nos.I and13,could also be used for question tag exercises (see Exercise13).
Note:
1 may for possibility rarely begins a sentence. Instead we use doyou think (that) +
present/future or is +subject +likely + infinitive:
Tom may know.
Do you think (that) Tom knows?
Is Tom likely to know?
2Useneedn’tas the negative ofmust.
1It may costЈ100.
2Men should help with the housework.
3Tom would pay her.
4They could play the guitar.
5We’re seeing Mary tomorrow.
6She ought to keep it in the fridge.
7You can understand it.
8The police were watching the house.
9You can go with him.
10They’ve got a house.
11Your boss will be angry.
12Tom should pay the fine.
13They may come tonight.
14They were cleaning their shoes.
15He must write in French.
16You have read the instructions.
17These pearls are made by oysters.
18The ice was thick enough to walk on.
19This will take a long time.
20They may (permission)take the car.
21You’ve made a mistake.
22Ann would like a skiingholiday.
23We must do it at once.
24Tom could come.
25They were in a hurry.
26There is enough salt in it.
27You could see the sea from the house.
28Ann will be able to drive you.
29They had written to him.
30We must cook it in butter.
31It is freezing.
32She ought to accept the offer.
33There’11 be time for tea.
34I’m right.
35He may be at home.
36He used to live here.