provide的用法和固定搭配 provide的用法和辨析( 七 )


It has been+ 时间段
+since+时间状语从句
当使用It has been… (某年或某个时间)时
因为该句为现在完成时态时
所以必须使用since
↓例句↓
It has been 5 years since I quit smoking.
我戒烟已经5年了 。
Next month, it will have been 4 years since I have been living in Brazil.
到下个月,我已经住在巴西4年了 。

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