Question

more careful the mistake would not been made

一道英语选择题`
If you ___more careful ,you would not have made so many mistakes.
A.were B.are C.had been D.have been.

Answer 1

C
固定用法吧算是,
(2) 虚拟语气过去式.表示与过去事实完全相反的假设.（注意这样用的时候并不存在楼上说的一般过去时的情况,而只有这种过去式形式表示这种假设）
if条件从句 had + 过去分词
主句 would/should/could/might + have +过去分词
Eg.If we had started earlier,we should not have missed the train.
If she hadn’t been ill,she might have come.