Question

i英语题求解析

Withou this wise mother,he_____such a successful scientist.(2003)
A.would not be comeB. should not have be come C.may not have be comeD.could not have be come
would，should，may，和could，有什么区别 答案选d

Answer 1

此题根据句意，明显是对过去动作（become a successful scientist）的虚拟，所以句子谓语应由“情态动词 + have done”构成，由此排除A；should not have done意思是“本不应该做（但做了）”，may not have done“可能没有做过某事”，could not have done“本不可能做到某事（但是做到了）”。根据整句句意，答案D明显为正解。