hecomelate,givehimthemessage.A.HadB.ShouldC.WouldD.Did请问为什么

Question

___ he come late,give him the message.
A.Had B.Should C.Would D.Did
请问为什么

Answer 1

这是一个虚拟条件句,省掉了if,完整的应该是:I he should come late,give him the message.
可以省略if的虚拟条件句的情况包括:当从句中有should,were,had这三个的任何一个时,都可省掉if.
如:If I were you,I would not do that.=Were I you,I would not do that.
If it had not for your help,I would not have finished it in time.=Had it not been for your help,I would not have finished it in time.