Thewindowamomentago.Nooneknewwhohaddoneit.--!Thewindowamomentago.Nooneknewwhohaddoneit.A.hadbeenbrokenB.wasbrokenC.hasbeenbrokenD.broke我知道答案是B.beendone和hasbeendone及bedone的用法和区别吗.

Question

The window____ a moment ago.No one knew who had done it.
-_-!The window____ a moment ago.No one knew who had done it.
A.had been broken
B.was broken
C.has been broken
D.broke
我知道答案是B.
been done和 has been done 及be done 的用法和区别吗.
都怎么用的.== 最好详细一点.
我给弄混了.o(╯□╰)o

Answer 1

三者时态不同,分别为过去完成时,现在完成时,一般时.为了帮助你理解,举几个例子：1.He told me that the book had be stolen by John.2.John has stolen the book.=The book has been stolen by John.3.Book is lost....