复合谓语的几种常见表示法
I.情态动词＋动词原形
1.情态动词can， could， may， might， will， would， shall， should都可与动词原形连用，如果要表示对现在或将来的推测时，情态动词的过去式与一般式在含义上并无多大区别，只是语气更为婉转。例如：
—Shall I give you a ride as you live so far away?
—Thank you. It couldn’t be better.(2005江西)
2. can， may， must和动词的完成时连用，表示对过去发生的行为或存在的状态进行想象和推测，含义是“可能已经”，“或许已经”，“一定”等。例如：
—Tom is never late for work. Why is he absent today?
—Something must have happened.(2005江西)
3.could， might， would， should， ought to， needn’t和动词的完成时连用，不仅可以表示对过去发生的行为或存在的状态进行想象和推测，而且还可以表示“本来可能”，“本来应该”完成而实际上并未完成的动作或状态，而needn’t则表示本来不必实现而又完成了这样一种情况。例如：
—Catherine， I have cleaned the room for you.
—Thanks. You needn’t have done it. I could manage it myself.（2005福建）
II. had better， would rathe r和动词原形连用，表示劝告或主观上做出选择。例如：
—Mum， I think I’m well enough to get back to school.
—Not really， my dear. You’d better stay home for another day or two.
III. be going to， be to， be about to， be able to， be likely to， have to， happen to， seem to， appear to， used to， get to等结构的情况极为普遍。例如：
—I’m going to leave at the end of this month.
—I don’t think you should do that until you’ve found another job.（2006北京）
I was about to go out when the telephone rang.
IV.表示说话及心理状态的动词如 say， report， believe， suppose， think， know， consider等的被动结构后面常接不定式。例如：
I don’t know the restaurant， but it’s said to be quite a good one.
The new secretary is supposed to report to the manager as soon as she arrives.
V.许多主动语态带复合宾语的动词构成被动语态后，补足语为带to的不定式、分词或形容词等，这也是一种复合谓语形式。例如：
John was made to wash the truck for a week as a punishment. The missing boys were last seen playing near the river.
VII.“连系动词＋表语”结构其中主语常是事物名词，谓语用主动形式表示被动意义。表语用形容词，常见错误是用成副词。例如：
1.谓语是某些表示知觉或感觉的动词，如 feel， sound， taste， smell， look， seem， appear等。例如：
—Do you like the material?—Yes. It feels very soft.
These oranges taste good.
2.表示从一种状态变为另一种状态的动词如 become， grow， get， turn， fall， go， come， run等。例如：
—Can I join your club， Dad?—You can when get a bit older.
It worried her a bit that her hair was turning gray.
3.表示保持某种状态的动词，如continue， remain， keep， stand， sit， lie， stay等。例如：
Tom kept quiet about the accident so as not to lose his job.
The temperature stayed high this week. br
