I couldn't help but cry.为什么后面不用不定式to cry呢?

问题描述:

I couldn't help but cry.为什么后面不用不定式to cry呢?
I couldn't help but cry

can`t help but 情不自禁
规定后面用动词原形can't help doing sth才是情不自禁做某事吧?can`t help doing sth 与 can`t help but do sth 都是情不自禁的意思