When所引导的时间状语从句,主句和从句各用什么时态?例题：We( )our breakfast when an old man came to the door.A.just have had B.have just had C.just had D.had just had请问这题该选什么答案?并说明理由!
问题描述：
When所引导的时间状语从句,主句和从句各用什么时态?
例题：We( )our breakfast when an old man came to the door.
A.just have had
B.have just had
C.just had
D.had just had
请问这题该选什么答案?并说明理由!
答
D
when引导的从句发生在过去,且“我们刚吃完早饭”,故主句应使用过去完成时态