cant help doing 与 cant help to do
请看下面一道题:
She cant help _________ the house because shes busy making a cake.
A. to clean B. cleaning C. cleaned D. being cleaned
【分析】 此题容易误选B,简单地套用 cant help doing sth 这一结构。其实此题应选A,注意以下两个结构均可用,只是含义不同:cant help doing sth=禁不住做某事,情不自禁地做某事; cant help to do sth=不能帮助做某事。前者为引申用法,一般辞书均作为固定搭配列出来,许多老师对此也比较强调,从而也就引起了同学们的足够重视,并因此形成了思维定势;而后者为 help 表示帮助时的本义用法,因同学们平时对此没引起注意,一看到上面的试题就马上联想到 cant help doing sth 这一结构,从而误选了B。请看下面一例:
While shopping, people sometimes cant help _________ into buying something they dont really need.
A. to persuade B. persuading C. being persuaded D. be persuaded
此题应选C(注意根据句意要用被动形式)。
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