to的后面,即使是过去式,也要加原型吗?

问题描述:

to的后面,即使是过去式,也要加原型吗?

这是最基本的,是to在充当不定代词的时候,后面加动词原形、
eg:I wanted to visit there.
但to充当介词的时候,后面的动词就要加ing了.
最多的就是词组,look forword to doing sth.
eg:I was looking forword to meeting you.