could not help后接doing和to do的区别!

could not help后接doing和to do的区别!

题目
could not help后接doing和to do的区别!
答案
1.can’t help doing sth.和can’t help but do sth 表示“不得不、禁不住做某事”,
We couldn't help laughing when we heard the funny story.
2.can’t help to do sth.表示“不能帮助做某事”,
I can't help (to) wash the dishes because I am busy preparing for the entrance exams.
而couldn't 是can't 的过去式
不明白的再问哟,请及时采纳,多谢!
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