cant help sth: if you cant help the way you feel or behave, you cannot control it or stop it from happening . You can also say that you cant help yourself. 不禁She couldnt have said it but she couldnt help herself.她忍不住说了。I cant help feeling sorry for the poor man. He cant help having big ears. 他总是忍不住打听别人的事情。sb cannot/cant help it if: used for saying that sb cannot be blamed for a situation不能怪罪某人Can I help it if people dont read the insructions?不看使用说明书，我能怎么着？It can(not) be helped/sb can(not) help it: there is (no) way of avoiding or preventing sth from happening可以/没法避免It cant be helped, well just have to manage without her. 没办法，我们只能.They never go there if they can help it. 如果可以的话，他们从来不去。cant but do: 不得不.只好I cant but admit that he is right and I am wrong. 不得不承认他对了，我错了。cannot help but do/cannot but do不得不：Everyone cannot help but be attracted by the world into which he is taken by the science fiction./People cannot but feel suspicious, for the whole thing looks so weird. nothing but do仅仅：All that money brought nothing but sadness and misery and tragedy. 给他带来的只是悲伤，痛苦和悲剧。