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Do的四作用

2010-06-04 10:37:54 　來源：網(wǎng)絡(luò)資源

　　動詞do在句中的作用可以概述為四句十二字："做"實義，助動詞，替前文，強語氣。

　　作用一：實義do

　　do作實義動詞時，有do, does, did, done, doing五種形式，還有及物、不及物之分。如：

　　1. vt. "做;研究;整理;完成"。如：

　�、賂he old man does an hour of sport every day.

　�、赟he did her homework at home last night.

　�、跰other was doing the cooking when I reached home.

　　④Have you done the exercises yet?

　　2. vi. "行動;工作;進展;足夠"。如：

　�、� Kate does very well in her Chinese.

　�、� How do you do? ③ Well done! ④ That will do.

　　作用二：助動do

　　do作助動詞時，只有do, does, did三種形式，無詞義，限用于含行為動詞的一般現(xiàn)在時和一般過去時兩種時態(tài)的否定句和疑問句中。如：

　�、賂hey don't have any tickets for tonight's concert.

　�、贙ate stayed at home last night, didn't she?

　�、跦ow many books does the library have?

　　④She doesn't do the washing in the evening.

　　作用三：替代do

　　為避免動詞的重復(fù)，使語言簡練，常以do, does, did替代前文所用的行為動詞。如：

　　①Tom runs much faster than you do.

　�、�-Lucy, can you get some more tea, please? -Sure. I'll do it right away.

　　②-Who broke the cup? 　-Mimi did.

　�、�-I like bananas. -So does he.

　　作用四：語氣do

　　為突出感情色彩，do常用于祈使句、強調(diào)句和倒裝句中，以加強語氣。如：

　�、� Do be careful. ② Don't tell a lie.

　　③ He did come.

　�、� -You often go to the park. -So we do.

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