这两词既可做实义动词用,又可做情态动词用。作为情态动词,两者都只能用于疑问句,否定句和条件句。 need 作实义动词时后面的不定式必须带to,而dare作实义动词用时,... [查看全文]
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... [查看全文]
问句 肯定回答 否定回答 Need you…? Yes, I must. No,I needn't Must you…? /don't have to. 典型例题 1)---C... [查看全文]
注意: 1)would like; Would like to do = want to 想要,为固定搭配。 Would you like to go with me? 2)Will you…? Would you like…? ... [查看全文]
would rather do would rather not do would rather… than… 宁愿……而不愿。 还有would sooner, had rather, had sooner都表示"宁愿"、"宁可"的意思。... [查看全文]
had better 相当于一个助动词,它只有一种形式,它后面要跟动词原形。 had better do sth had better not do sth It is pretty cold. You'd bet... [查看全文]
should 和ought to 都为"应该"的意思,可用于各种人称。 ---Ought he to go? ---Yes. I think he ought to. 表示要求,命令时,语气由 should(应该)、had better最好)、must(必须)渐强。 [查看全文]
1) may(might) have + done sth, can (could) have + done sth 表示过去,推测过去时间里可能发生的事情。 Philip may (might) have been hurt seriou... [查看全文]
can, could, may, might, must 皆可表示推测,其用法如下: 1)情态动词+动词原形。 表示对现在或将来的情况的推测,此时动词通常为系动词。 I don't know w... [查看全文]
1) must用在肯定句中表示较有把握的推测,意为"一定"。 2) must表对现在的状态或现在正发生的事情的推测时, must 后面通常接系动词be 的原形或行为动词的进行式。 ... [查看全文]