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. 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. “行动；工作；进展；足够”。如：
①Kate does very well in her Chinese.
②How do you do?
③Well done!
④That will do.
Do做语气词：
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.
今天就和大家就分享到这，祝愿同学们用辛勤的汗水去收获美好的未来吧！