HAVE DONE和DID的区别在哪里，一句话能说完么？
I saw a movie last night which is a sad movie, I have cried for hours that's why my eyes get swollen.
这个句子对的，只是，没必要把句子变这么复杂的。
I saw a movie last night, it was a sad movie. I cried for hours, which is why my eyes get swollen.
have done是强调完成了，
I had cried for hours before going to bed, which is why .......
通常后面还有问题的。
I saw a movie last night which is a sad one. I cried for hours and that's why my eyes get swollen.
I have seen a movie which is a sad one. I wwas crying while watching it. That's why my eyes get swollen.
直接用过去时即可，没必要用现在完成时。
I saw a movie last night,which was a tragedy.I cried during the watching time,Thats why my eyes get swollen now.
你看电影是过去式了，哭了很久也是last night 的事，而have done 是做过的事对现在的影响即眼睛肿了,哭的动作不能用have cried
I have done是强调你完成了某件事情。
I did是强调动作。
你可以直接说I watched a sad movie last night 不需要用which is. watch a movie not see a movie.
还有你应该说I cried when I was watching the movie。
I did 就是发生在过去的一件事对现在没有影响比如I did my homework last night.
I have done是过去发生的一件事对现在有影响比如I have done with my homework from yesterday so I got an "A" for today's grade. 所谓对现在有影响就是在句子后面加上现在发生的事。
i have done和i just did有什么区别吗?
I have done 和 I just did 有语义区别。
现在完成时（have done）表达行为结果和到说话时为止的状态，一般过去时（did）陈述过去发生的行为。在真实的英语环境中，一般过去时的使用频率相当高，这是因为人们在讲述过去发生的事情时，主要是陈述事情经过或描述行为。比较：
- Did you do your homework? （仅对是否做了作业提问）
- Yes, I did. （陈述事实）
如果强调结果，则要用现在完成时：
- Have you done your homework yet? （对做作业的结果提问，做完了没有）
- Yes, I have. （强调做作业的结果，做完了）
