在通常情况下，介词后接动词要用
动名词，不用
不定式。如：
He is good at diving. 他擅长跳水。
After swimming I felt cold. 游完泳我感到冷。
I’ m against saying anything. 我反对说话。
She kept herself from laughing. 她忍住没笑。
He worried about making mistakes. 他担心犯错误。
They’re thinking of moving to America. 他们想搬到美国去。
This is a tool for opening tins. 这是一个开罐头的工具。
He left without paying his bill. 他没有付账就走了。
I have no experience in teaching English. 我没有教英语的经验。
They escaped by sliding down a rope. 他们是从一根绳子上滑下来逃走的。
但是，当表示“除……外”的介词 except, but 后通常接不定式作宾语，且这个不定式有时带to(若其前没有动词do)，有时不带 to(若其前有动词do)。如：
They desired nothing but to succeed. 他们只想成功。
They did nothing but complain. 他们老是一个劲地抱怨。
I can do everything except cook. 除了做饭我什么事都会做。
It had no effect except to make him angry. 除惹他生气外，没产生任何效果。