过去式与现在完成式Ihavewrittenthreeletterstohim,hedidnotreturn和Iwrittenthreeletterstohim,hehaveneverreturned.哪一句是正确的?区别在哪里?

Question

过去式与现在完成式
I have written three letters to him,he did not return
和
I written three letters to him,he have never returned.
哪一句是正确的?区别在哪里?

Answer 1

I have written three letters to him,he did not return
现在完成时是在现在以前已经完成的事,强调对现在的影响.一般,现在完成时的事是发生在过去时之前的.
另外,i written three letters to him本身就是不对的,written是过去分词,不可以和主语单用