释义：
can't stop ... ing 不得不做某事
can't 为否定，stop 从内容上也是否定语。因此否定的否定为强烈的肯定，即 can't stop ... ing 表示无法停止，换句话说就是“不得不继续做某事”。
例句：
Ever since you left, I can't stop thinking about you.
自从你离开之后，我无法克制思念的心情。
I can't stop crying.
我只好一直哭下去。
I'm sure you can't stop loving me.
我相信你会一直爱我。
I couldn't stop laughing at your story.
听了你的话，我没办法忍住笑。
对话：
A: Why are you always so sad?
你为什么总是那么悲伤？
B: I can't stop thinking about my ex-boyfriend.
我一直忘不了前男友。
