现在完成时一般用had done来开头 而一般过去式呢用did 比如,I have finished my homework.这个意思就是指我已经完成我的家庭作业了 I did my homework.而这句呢,意思为我做了我的家庭作业 现在完成式强调的是已经完成了,而一般过去式呢,只是说明我已经做了什么事
第2个回答 2006-04-07
I had finished this work last week because I friend helped me. 过去完成时:had + 动词过分词