can✀t help to do和can✀t help doing的区别

1. can't help doing sth 意思是：“禁不止做某事”。
2. can't help( to) do sth [to 可省略] ，意思是：“不能帮助帮某事”。
如：
1). She couldn’t help smiling.
她禁不住笑了起来。
2).She couldn’t help crying when she heard the news.
当听到这个消息时,她禁不住哭了起来。
3). I can’t help to do it.
我不能帮忙做这事。　　
4). He couldn’t help to wash the clothes.
我不能帮忙洗衣服了。
拓展：
help sb (to ) do sth = help sb with sth .
帮助某人做某事
如：
He often helps me (to) learn English.
He often helps me with my Engish.
他经常帮我学英语。

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

1.can’t help doing 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.