问题
选择题
Sorry，I am too busy now.If I ________ time，I would certainly go for an outing with you.(2012·湖南)
A．have had
B．had had
C．have
D．had
答案
答案：D
句意：对不起，我现在太忙了。如果我现在有时间的话，我会和你一起出去郊游。根据句意以及句中的now可知，此处表示对现在情况的一种假设，所以从句中谓语动词要用过去式，而主句用“could/would/should/might＋动词原形”。