小猪cms生活通o2o源码:急救I did my homework at once and begin to ....中有了DID，begin还要不要用过去式

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to后要不要跟动原？

用过去时，因为did是实意动词，不是助动词。
to 后要跟动原，因为这里是动词不定式
begin to do sth.

began，因为它跟did是并列的谓语动词，时态都是过去式
to后要跟原型

要用过去式,and连接的是并列成分,to后用原形

急救I did my homework at once and begin to ....中有了DID，begin还要不要用过去式 After I did my homework , I go on___ some books . I do my homework at( )six thirty. I went to bed after I finished doing my homework. I am dong my homework.反意疑问句是什么？ I will go to bed after I finish my homework .改为同义句 I watched TV after I finished my homework last night(改为同义句) I won’t go to bed until I finish my homework. I myself did my work，这句有语病吗？ I __my homework ,mom? Really?When did you finish it? A finished B have finished C had finished