英语疑难解析：can't help（doing还是can't help to do）

#英语语法疑难答疑#

先看下面一题：

He knows nothing about it, so he can"t help _______ any of your work.

A.doing

B.to do

C.being doing

D.to be done

【陷阱】

容易误选A，根据 can"t help doing sth这一结构推出。

【分析】

其实答案应选B。比较以下结构：

can"t help to do sth

不能帮助做某事

can"t help doing sth

禁不住做某事，情不自禁地做某事

又如下面一题，答案也是B：

She can"t help ____ the house because she"s busy making a cake.

A cleaning

B.to clean

C.cleaned

D.being cleaned

再请看以下试题：

While shopping, people sometimes can"t help _____ into buying something they don"t really need.

A.to persuade

B.persuading

C.being persuaded

D.be persuaded

此题应选C，句中的 can"t help意为“禁不住”（注意根据句意用被动形式）。