一道英语语法的选择题It ——15 years since he left here.Awas B has been C has D will be 我看过很多这种类型的题都是选择is,要怎么区分啦

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一道英语语法的选择题It——15yearssincehelefthere.AwasBhasbeenChasDwillbe我看过很多这种类型的题都是选择is,要怎么区分啦一道英语语法的选择题It——15

一道英语语法的选择题It ——15 years since he left here.Awas B has been C has D will be 我看过很多这种类型的题都是选择is,要怎么区分啦
一道英语语法的选择题
It ——15 years since he left here.Awas B has been C has D will be 我看过很多这种类型的题都是选择is,要怎么区分啦

一道英语语法的选择题It ——15 years since he left here.Awas B has been C has D will be 我看过很多这种类型的题都是选择is,要怎么区分啦
二楼的正解.

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It is (has been)+时间段+since+clause
此句型的要点:(1)在于since前后句子的时态.since前的时态为is或has been,后的时态为一般过去时
　　Eg: It is(has been) ten years since I joined the army
　　译为:我参军已经十年了.
　　要点(2) since后的动词若为延续性或状态性动词,应译为否定或相反,若为短暂性动词按字面意思翻译.
　　Eg:1It is(has been) ten years since I was a teacher
　　=It is(has been) ten years since I left the army
It is ten years since I smoked
　　=It is ten years since I stopped smoking
　　译为:我戒烟十年了.

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应该选is的吧但是没is啊

since是现在完成时的标志，该句为现在完成时，所以谓语动词应该是has been 。
当句子是一般现在时是，才用is。

选择B。since加过去的时间，用现在完成时。

选B，表示自从他离开一直到现在已经15年了

应选B

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