-How long have you learned English?-I have learned it I came here．( )A．becauseB．sinceC．soD．as 题目和参考答案——青夏教育精英家教网——

题目内容

20．-How long have you learned English？
-I have learned it _________ I came here．（　　）

A．

because

B．

since

C．

so

D．

as

分析 -你学英语多久了？
-自从我来这里，我就学英语了．

解答答案：B．通过语境及题意可以看出，本题考查的是连词的用法．通过have learned可以看出这是考察现在完成时的用法，后加for或者since来表示时间段或者时间点．I came here．是一个表示过去的时间的句子，通常使用since来连接．since汉语意思为"自从"，because汉语意思为"因为"，so的汉语意思为"因此"，as汉语意思为"当…的时候"．故选B．

点评做这种题时，一是要确定句子的时态--现在完成时．同时注意现在完成时的标志性单词：for，since．再就是注意连词的意思，即可选出正确选项．

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