题目

It is said in the book that Tomas Edison __________ the world leading inventor for sixty years.
A.would be B.has been C had been D was
-George and Lucy got married last week .Did you go to their wedding?
-No,I ___________.Did they have a big wedding?
A.was not invited B.have not been invited
C.hadn't been invited D.didn't invite
C 我选的是C 请问这该怎么区分
for sixty years 要用完成时吗

提问时间：2021-01-23

答案

过去完成时可以表示过去的过去,第一题是说明一个事实,过去的一个事,并没有突出要在哪一个时间点之前的过去,所以就用一般过去时.第二题说的是婚宴之前我没收到邀请,过去的过去.