初中·課本中不會教你的 357　can't help doing sth.和can't help but do sth.

357　can't help doing sth.和can't help but do sth.

　can't help doing sth. 是正確說法，意為“不禁……，不由得……”，在這層意思上不能說can't help to do sth.。這種結構中的help不表示“幫助”。can't help but do sth. 表示“只能做……”。

He couldn't help laughing when he heard her words. 聽到她的話，他不由得大笑起來。

Whenever I see the photo, I can't help thinking of my childhood. 每當我看到照片，我都不禁想起童年。

They couldn't help but respect him. 他們不由得對他充滿敬佩之情。

It is raining hard outside, and if you go out, you can't help but get your shoes wet. 外面正下著大雨，你如果出去，鞋子一定會弄濕的。

She can't help crying . （正）她不禁哭了起來 。

She can't help to cry . （誤）