-A rat was caught by a cat.
此外,助动词和情态动词还有下列用途:
㈠构成疑问句附加语,如:
● Mr Chen has not become a businessman, has he?
● Jasons lectures are clear and easy-to-understand, arent they?
㈡构成简短答语,如:
● -Who can answer this question?
-Sam can.
● -Will you help us with the gardening?
Yes, I will. /No, I wont.
● -I have seen that film before.
-So have I.
● -William isnt a hypocrite.
-Neither is his wife.
㈢构成省略句,如:
● I cant understand him. Can you ?
● The boss doesnt often come to the factory and when he does, it is generally on Sunday.
除了do, be, have之外,作为第三人称现在时态(third person present tense)时,助动词和情态动词语尾不起变化,也就是不必有-s这形式。例如:
I can write English. He can write English, too.
Tom will know soon, but he will never know.
All of you may go. Jack may also go if he wants to.
(注意be代表其他几个助动词:is, am, are, was, were, being, seen)
【英语讲义【84】助动词与情态动词】相关文章:
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