现在完成时:
I have learned about 2000 English words so far.
到目前为止,我已经学习了约2000个英语单词。
过去完成时:
She didn’t go to bed until she had finished her work.
她直到把工作做完之后才睡觉。
They had wanted to help but could not get there in time.
他们本来打算去帮忙,但没有及时赶到那里。
I have collected 300 stamps till now.
I had finished my homework by 9 o'clock yesterday.
She had finished her job before her manager asked her to go home.
有不懂欢迎问~
是一条过去完成时的句子还是两条啊?