Question

Sorry, I am too busy now. If I _____ time, I would certainly go for an outing with you.

1. A.
   have had
2. B.
   had had
3. C.
   have
4. D.
   had

Answer 1

D
本題考查虛擬語氣。句意：對不起，我很忙。要是我有空的話，我肯定會和你一起去郊游。既然I am too busy，說明“我有空”只能是對現(xiàn)在的一種假設(shè)，所以此處為虛擬語氣。含有主從復(fù)合句的虛擬語氣在if從句中謂語動詞通常用過去式形式表現(xiàn)在，所以答案應(yīng)選had。