will be+ 过去分词与will have been+ 过去分词的区别
问题描述：
will be+ 过去分词与will have been+ 过去分词的区别
.By the time the author comes back from abroad,all the books_______.
A.will have punished B.will have been punished
C.will be punished D.have been punished
答
by the time ...到...时间为止.显然这是说一个已经完成的动作.而这件事是一个在将来某一时间将会完成的事件,所以用将来完成时.will have been published
等到作者从海外回来的时候,所有的书应该都已经出版了.表达的就是这个意思
另外.punish这个词是惩罚的意思