英语 Do后面加什么词,什么词后面接动词的原型

do 1 做行为动词（实义动词） I do my homework.He does the cooking.
2 助动词 I don't like fish.He doesn't go to school.后面跟动词原形
I do know the boy.I did go to the park.do作强调用,有时态变化,后面接动原.
接动员的词很多 can,will,shall,...情态动词 还有 had better would rather rather than
help 虚拟语气的句中