词语练习：

带to 的情态动词有四个：ought to, have to, used to, be to, 如加上have got to ,(=must), be able to，为六个。它们的疑问，否定形式应予以注意：

Do they have to pay their bill before the end of the month?

She didn't use to play tennis before she was fourteen.

You ought not to have told her all about it.

Ought he to see a heart specialist at once.?

ought to 本身作为情态动词使用。其他的词作为实义动词使用，变疑问，否定时，须有do 等助动词协助。

例题：

Tom ought not to ___ me your secret, but he meant no harm.

A.have told　B.tell　C.be telling　D. having told

Check the answer

Relevant link：

2012翻译资格二级口译考试每日一练（6月19日）

（责任编辑：中大编辑）

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