用括号中动词的正确形式填空,说明为什么这样填
问题描述：
用括号中动词的正确形式填空,说明为什么这样填
1.When I lost my wallet,I never expected it to ____(return)
2.I didn't receive the letter.I think it _____in the post.(must lose)
3.The PLA____on August 1st,1927(found)
4.He left home as a young man and ______since (not see)
5.The thieves ____50,000 from the shopping mall.(steal)
6.Japanese ___as the second language in China (learn)
答
be returned 表示被动.被还回来
must have been lost表示对过去的推测,上文是过去时,所以表示过去一定是丢在,
was founded表示被动.被成立
hasn't been seen因为后面的介词since 意思是从那时到现在,要用现在完成时.
have stolen句子中没有时间状语,所以是表示现在的结果.要用现在完成时.
is learned表示一般情况,这种语言一直在中国被学.所以用一般现在时.