搜题库

动词 do 在句中的作用可以概述为四句十二字：“做”实义，助动词，替前文，强语气。
作用一：实义，动词 do
do 作实义动词时，有 do, does, did, done, doing 五种形式，还有及物、不及物之分。如：
1、“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、“行动；工作；进展；足够”。如：
①Kate does very well in her Chinese. ②How do you do? ③Well done! ④That will do.
作用二：助动 do
do 作助动词时，只有 do, does, did 三种形式，无词义，限用于含行为动词的一般现在时和一般过
去时两种时态的否定句和疑问句中。如：
①They don't have any tickets for tonight's concert. ②Kate stayed at home last night, didn't she?
③How many books does the library have? ④She doesn't do the washing in the evening.
作用三：替代 do
为避免动词的重复，使语言简练，常以 do, does, did 替代前文所用的行为动词。如：
①Tom runs much faster than you do.
②-Lucy, can you get some more tea, please? -Sure. I'll do it right away.
②-Who broke the cup? -Mimi did. ③-I like bananas. -So does he.
作用四：语气 do
为突出感情色彩，do 常用于祈使句、强调句和倒装句中，以加强语气。如：
①Do be careful. ②Don't tell a lie. ③He did come. ④-You often go to the park. -So we do.