题目内容
18.-Alice,could you tell me when your sister ______ from Harbin?-I'm not sure.I will call you when she ______.( )
| A. | will come back; will return | B. | will come back; returns | ||
| C. | comes back; will return |
分析 ---爱丽丝,你能告诉我你的姐姐什么时候回从哈尔滨回来吗?
---我不知道,她回来了我就给你打电话.
解答 答案:B.第一个when引导的是宾语从句,主句是委婉语气,从句时态不受限制,这里表达的是将来的动作,故用一般将来时will+动词原形,第二个when引导的是时间状语从句,从句用一般现在时代替一般将来时,主语she,故returns,故答案是B.
点评 when引导时间状语从句时,表示"当…的时候",从句的谓语动词可以是延续性的,也可以是非延续性的.它引导的时间状语从句通常用一般现在时表示一般将来时;用一般过去时表示过去将来时;用现在完成时表示将来完成时.
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