Do 的四作用

　　動(dòng)詞do在句中的作用可以概述為四句十二字："做"實(shí)義，助動(dòng)詞，替前文，強(qiáng)語(yǔ)氣。

　　作用一：實(shí)義do

　　do作實(shí)義動(dòng)詞時(shí)，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：

　　①The old man does an hour of sport every day.

　　②She did her homework at home last night.

　　③Mother was doing the cooking when I reached home.

　　④Have you done the exercises yet?

　　2. vi. "行動(dòng)；工作；進(jìn)展；足夠"。如：

　　①Kate does very well in her Chinese.

　　②How do you do?

　　③Well done!

　　④That will do.