這兩詞既可做實義動詞用,又可做情態(tài)動詞用。作為情態(tài)動詞,兩者都只能用于疑問句,否定句和條件句。 need 作實義動詞時后面的不定式必須帶to,而dare作實義動詞用時,... [查看全文]
帶to 的情態(tài)動詞有四個:ought to, have to, used to, be to, 如加上have got to ,(=must), be able to,為六個。它們的疑問,否定形式應(yīng)予以注意: Do... [查看全文]
問句 肯定回答 否定回答 Need you…? Yes, I must. No,I needn't Must you…? /don't have to. 典型例題 1)---C... [查看全文]
注意: 1)would like; Would like to do = want to 想要,為固定搭配?! ?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… 寧愿……而不愿。 還有would sooner, had rather, had sooner都表示"寧愿"、"寧可"的意思。... [查看全文]
had better 相當于一個助動詞,它只有一種形式,它后面要跟動詞原形?! ad better do sth had better not do sth It is pretty cold. You'd bet... [查看全文]
should 和ought to 都為"應(yīng)該"的意思,可用于各種人稱。 ---Ought he to go? ---Yes. I think he ought to. 表示要求,命令時,語氣由 should(應(yīng)該)、had better最好)、must(必須)漸強。 [查看全文]
1) may(might) have + done sth, can (could) have + done sth 表示過去,推測過去時間里可能發(fā)生的事情?! hilip may (might) have been hurt seriou... [查看全文]
can, could, may, might, must 皆可表示推測,其用法如下: 1)情態(tài)動詞+動詞原形。 表示對現(xiàn)在或?qū)淼那闆r的推測,此時動詞通常為系動詞。 I don't know w... [查看全文]
1) must用在肯定句中表示較有把握的推測,意為"一定"。 2) must表對現(xiàn)在的狀態(tài)或現(xiàn)在正發(fā)生的事情的推測時, must 后面通常接系動詞be 的原形或行為動詞的進行式。 ... [查看全文]