He ______ there since he came to China.

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问题 He ______ there since he came to China.

选项 A、lived
B、has lived
C、is living

答案B

解析 本题考查时态。since表示自从那时起一直持续的动作或状态,所以要用完成时态,答案为B。[知识拓展] since有时还可连接原因状语从句。用法区别为:as和since引导的原因从句常常放在前面,但有时也可以放在后面。如:As all the seats were full,I had to stand all the time.因为所有的座位都有人,我只好一直站着。because一般指出直接的原因,回答why引起的问句。because引导的从句,通常放在主句的后面,但是有时为了强调也可以放在前面。如: He distrusts me because I am new.我是新手,所以他不信任我。for表示原因,在书面语中用的比较多,引导的分句对前面的话进行分析解释,常用逗号把它和前面的分句隔开。如:The days are short,for it is now December.白天很短,因为现在已经是十二月了。
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