问题
选择题
_______ there yesterday, I could have asked him not to do so．
A．If I were
B．If I was
C．Had I been
D．Was I
答案
答案：C
考查含有if条件状语从句的虚拟语气。根据yesterday,可知指的是过去的情况，应该用if I had been there yesterday,可以将助动词had提到句首，省略if，即Had I been there yesterday。所以选C。