Do you know that后为什么是动词过去式,前面不是有do吗?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/30 16:59:37

Do you know that后为什么是动词过去式,前面不是有do吗?
Do you know that I fell in love with you at the frist sight,后面为什么是fell?前面不是有do要用原型吗?

这是一句复合句,也就是有两个句子,整个句子里面还套有一个小句子：I fell in love with you at the first sight.
大句子是主句,小句子是从句.
按道理,一句话只要第一个动词变过去式就可以了,但像我刚才说的,这里有两句话.所以,要根据具体情况确定每个句子里动词的形式.

Do you know that后为什么是动词过去式,前面不是有do吗? Do you know the girl colled Gina?为什么coll要+ed不是do后动词用原形吗? 为什么不是Why do you know that,而是How do you know that Do you know where he lives?do did dose后面动词不是用原形吗?为什么要用lives加 Do you know where he went yesterday do后面不是要加动词原形吗,为什么went没有变 do you know something bad happened .do you know不是疑问句吗为什么some in case that 后的虚拟语气不是有两种情况吗?一种是should do 另外一种是过去式 i do know that 的过去式 ____ do you know that do you know that/if Do you parents know that? do you know where it is 为什么不是do you know where is it?