we are looking forward to hearing from you but just now at the gate I looked forward to see no

问题描述:

we are looking forward to hearing from you but just now at the gate I looked forward to see no
we are looking forward to hearing from you but just now at the gate I looked forward to (see) no mailman coming.
为什么 后面的 look forward to 要用 原形?

当look forward表示期望的时候后面要跟doing,可是后半句的look forward只是表示向前看,to see表示看到的结果.