作业帮It __ten years since he left Shanghai.为什么用is,不用had been.意思是“从那时有多久”？
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It __ten years since he left Shanghai.为什么用is,不用had been.意思是“从那时有多久”？
It __ten years since he left Shanghai.
为什么用is,不用had been.
意思是“从那时有多久”？
It __ten years since he left Shanghai.为什么用is,不用had been.意思是“从那时有多久”？
it is...since 是固定用法
用has been , is肯定不对的。
had been时态不对，是过去完成时
这里是讲述一个事实,所以要用一般现在时.
用was就会导致后面的时态变诚since he had left shanghai.了
要是用had been,后面的时态就更不对了!
It __ten years since he left Shanghai.为什么用is,不用had been.意思是“从那时有多久”？
it's years since i
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It was ten years since I left my hometown.改错
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It is years since we meet last time.（纠错）
It has been 3 years since he came here.
It's three years since he was married .的翻译
It is three years since she was in the
It has passed 10 years since we met last time.
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It has been there since a t_ years ago .
求解英语翻译：It's 2 years since he smoked.
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