【问】 《英语考试题典》(本科生、研究生专用)(吉林科技出版社，P.131)有一道判错题：
 Charlie assured wife that there danger， she could not help
 该书编者判D(but worry)为错误。但我认为D(but worry)并没有错。
 【答】 可能编者把cannot(couldn't) help but和cannot (couldn't) help两个结构弄混了。can-not(couldn't) help but之后应跟动词原形：
 1. When the streets are full of melting snow.you can't help but get your shoes wet.(DAI)
 当街道上满是融化的雪水时，你是不能不把鞋子弄湿的。
 2. When a friend gave Jim a ticket to the game，he couldn't help but go.(DAI)
 当一位朋友给了吉姆一张比赛门票时，他是不能不去的。
 3. You can’t help but respect him. (Barrie)
 你禁不住会尊敬他。
 4. You can’t (help) but admire him. (CGEL)
 你禁不住会敬佩他。
 而在cannot (couldn’t) help之后则应跟动名词。请对比这两种不同的用法：
 1. When I read the play now I can’t help thinking of Cyril. (Wilde)
 当我现在看这个剧本时，我禁不住想起了西里尔。
 2. She couldn’t help smiling. (Mansfield)
 她禁不住笑了。
 3. She could not help feeling depressed. (Dreiser)
 她禁不住觉得沮丧。
 4. “I don’t think Professor Jones meant to be funny this morning，do you?”“No，althoughI couldn’t help____at some of his remarks. ”
 A. from laughing B. to have laughed
 C. but laugh D. to laugh (TOEFL，71.5)
 (参见 can but/cannot but)