题目内容
5.-Why didn't you try your best to get on the subway?--I tried to,but it started moving _________ I could get on it.( )
| A. | before | B. | after | C. | since | D. | if |
分析 --你为什么没有尽你所能坐上地铁呢?--我尝试了,但是在我登上之前,地铁就开始移动了.
解答 答案A.before意思是"在…以前"引导时间状语从句;after意思是"在…之后"引导时间状语从句;since意思是"自从…以来"引导时间状语从句;if意思是"如果"引导条件状语从句.根据"Why didn't you try your best to get on the subway"可知他没坐上地铁,没坐上地铁的原因是"it started moving _________ I could get on it"在坐上之前,地铁就开走了.所以要用before,故选A.
点评 首先要掌握这些从属连词的意思以及用法,然后结合具体的句意,以及给出的选项,就可以确定正确答案.
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