make sure 后面为什么用过去完成时
2024-12-13 21:58:18 学考宝 作者：佚名
问题描述
In future, I would make sure I'd checked out whoever was fitting it with their previous customers.
请问 make sure 后面的从句中为什么用过去（完成）时而不用现在（完成）时？
老师答疑
刘老师：
▲首先注意：in future不一定指“从现在往后”。它可以用于过去将来时，意为“从那以后”，“从当时那个时间往后”。例如：
I asked her to be more careful in future. 我要她以后要更加小心。
He would never make such a mistake in future. 他从那以后决不再犯如此错误。
包括你的例句：
In future, I would make sure I'd checked out whoever was fitting it with their previous customers.
▲在would make sure的宾语从句中，had checked out 属于“过去的过去”，说明发生在would make sure 之前。而在checked out的宾语从句中，使用过去进行时 was fitting，不用现在进行时，因为从句的时态受主句制约。我们不能说：He asked me what I am doing. 应改为was doing。
陈老师：
in future, I would make sure I'd checked out whoever was fitting in with their previous custoemrs.
had checked 在确保之前发生，故为过去的过去。
check out=了解清楚;核实;查实
