初中英語考試最常出現(xiàn)的錯(cuò)誤： 情態(tài)動(dòng)詞

　　七. 情態(tài)動(dòng)詞

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　　41．He can be at home now because the light in his room is still on.

　　表特別有把握的肯定判斷時(shí)用must，表特別有把握的否定判斷時(shí)用can, can表判斷時(shí)只用在否定句中。因此把can 改為must。

　　42．He need come here before the meeting begins.

　　作情態(tài)動(dòng)詞時(shí)need用在否定，疑問和條件句中，不能用于肯定句中，而作實(shí)意動(dòng)詞時(shí)則可以。所以應(yīng)改為：He needs to come here before the meeting begins.

　　43．He used to get up very early in the morning, and now he is still doing so.

　　used to 用來表示過去常常做某事而現(xiàn)在不了，所以應(yīng)把后半句改為：but now he is not doing so.

　　44．I needn’t come yesterday because all the work had been finished.

　　由于情態(tài)動(dòng)詞本身不體現(xiàn)時(shí)態(tài)，所以在談?wù)撨^去的事情時(shí)在情態(tài)動(dòng)詞后加 have done，因此在 needn’t 后加have。

　　45．You hadn’t better stay up too late because you have to get up early tomorrow.

　　had better 的否定在 better 后面加not.

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