英语语法 I propose to inventing a monitoring control system to reduce the traffic congestions we facing today.

把inventing 改成invent,就可以了。I propose to invent a monitoring control system 是一个完整的句子，后面的to reduce the traffic congestions 做control 的宾语补足语，we facing today做congestions的定语。

正确语法：
I propose to invent a monitor-control system to reduce the traffic congestion we are facing today.
原因：
to 后面直接接动词，不接动词的ing形式 ;
monitor-control这种形式用来做形容词修饰system ;
交通拥挤应该用traffic congestion
没有we facing 直接修饰名词的做法，必须用we are facing 表示“我们正在面对的”

propose to do,后面加动词原形,表示打算干什么.I propose to invent a monitoring control system to reduce the traffic congestions we are facing today

I want to invent a monitor control system to reduce the traffic congestions we are facing today.
I plan to invent a monitor control system to reduce the traffic congestions we are facing today