人教版高一英语短语归纳：can't help doing sth.
can't help doing sth. 禁不住做某事，不由得不做某事
She couldn't hep smiling.
(1) can't help but do 不得不……;不能不
When the streets are full of melting snow, you can't help but get your shoes wet.
(2) cannot but 不能不，只能
He could not but feel disappointed.
(1) help (sb.) (to) do sth. Help me get him back to bed at once.
By helping them we are helping save ourselves.
(2) help...with sth. 帮助……做某事
In those days he used to help her mother with her gardening.
(3) help oneself / sb. to sth. 给自己 / 别人夹菜 / 拿烟等;擅自拿用
May I help you to some more vegetables?
(4) help...in sth. 在……方面帮助某人
She offered to help Rose in the housekeeping when I am not here.
(5) help out 帮忙 (做事;克服困难等)
I've often helped Bob out when he's been a bit short of money.