英语问题有点弱 I ()not do it very well 括号中应该填do or am?Why?

如果是肯定句,就用单独的动词做谓语.表示一般时态,I do it very well.但如果是否定句,不能直接在动词后面加not,必须加don't,因此就是I do not do it very well.
表示现在进行时,I am doing it very well.如果变成否定句,就是 I am not doing it very well.
表示过去式,I did it very well.否定句,也是不能直接在动词后面加not,应该加didn't,I didn't do it very well.
过去完成时,I have done it very well.否定句,I haven't done it very well.
过去正在完成时,I have been doing it very well.否定句,I haven't been doing it very well.

应该填do,在这里是助动词,第二个do是实义动词,没有be do 的形式

I am not do it very well
我不是做得很好

正确答案是do, I don't do it very well. 因为如果用am的话，后面就应该是doing it very well.

关于你提的问题，我觉得你对时态和语态搞不清晰，这个首先从句子的基本结构来说（S+o+v即主谓宾），这是最简单的句子结构，如“我是。。。，我做什么”，这时我们就要考虑哪些能做谓语了，助动词（do做,have有），系动词（包括be动词am,is ,are；连系动词get,come等，虽然这些也表动作的发生，你可能会认为它们应该归为助动词这类，但因为它使某种状态持续发生，所以归为连系动词），情态动词（c...

应该填写have
这里的词语不是作谓语了