if I () time ,I'll go shopping with you A 、have B、have had C、will have

问题描述:

if I () time ,I'll go shopping with you A 、have B、have had C、will have
if I () time ,I'll go shopping with you
A 、have B、have had C、will have
那么A和B选项是用在什么时态呢
能举例说明吗?

选A
不能选C.因为这是个If 引导的条件状语从句,在条件状语从句中要用一般现在时表将来.请记住这一点