关于高中英语非谓语动词的3道选择题!

题目

关于高中英语非谓语动词的3道选择题!
① ( )that she didn't do a good job,I don't think I am abler than her.
A.To have said B.Having said C.To said D.Saying
②.The glass doors have taken the place of the wooden ones at the entrance( )in the natural light during the day.
A.to let B.letting C.let D.have let
③.We finshed the run in less than half the time( )
A.allowing B.to allow C.allowed D.allows
请解释得详细点、顺便说一下做有关非谓语动词的题究竟需要哪几步.不要随便复制别的地方

答案

B B c
第一题：主语她与说是主动关系,又因为与that后面所表述的事情有先后顺序,say这个动作先发生,所以选B
第二题：letting表示状态
第三题：时间是“被允许”的,所以选择一个表示被动的C