曾经的一摸卷 时态和非谓语

题目

曾经的一摸卷 时态和非谓语
Iraq Pavilion was opened to the public one month later,which ___ the last one to be shown in the World Expo in Shanghai.
a.may be b.would be c.must have been d.should have been
(为什么选c?似乎和语义中的时间什么的有关,麻烦顺便大致翻一下)
_____ in the Internet,more and more people would like to watch the movies online than go th the cinema.
a.Involving b.Involved c.To involve d.Being inbolved
invlovd 和being involved.being involved 是进行时么?有的时候好像也用来表示不是进行的被动呢,怎么区分呢?）

答案

1.must have done ,虽然有情态动词,但是他和情态动词无关,他是只对过去发生事情肯定的推测The ground is wet ,it must have rained last night.must have done是对过去事实的肯定猜测 而must have been doing 表示某...