It is about time虚拟语气用过去式或should do的区别

If you have really been studying English for so long, it's about time you ____ able to write letters in English.

A) should be B) were C) must be D) are

这道题选B，为什么A不对？it is about time虚拟语气有时候不是也用should do吗

it is time sb did sth 结构中，should do偶尔使用，但现在几乎淘汰了。最为常见的用法就是that从句用过去时。所以四选一是选最佳答案，你应该选过去时were。并不是should be是错误的，而是这种用法现在很少使用。

曹荣禄 -

擅长：动词用法,句法问题 | 采纳率 82% | 回答于 2022-03-09 21:55

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