一、详细释义：


phr.

不得不，忍不住


例句：

I cannot help admiring his courage.|| I cannot but admire his courage.

我对于他的勇气不胜佩服。


例句：

The joke is so interesting that you cannot help laughing after listening to it.

那个笑话太有趣了，听了真叫人忍俊不禁。


二、词义辨析：


cannot help,cannot but,cannot help but

这些词组均表示“不得不，不禁”之意。 cannot help与动名词连用，表示“不得不”是口语用法，词组中的help相当于avoid或prevent，是一种比较好的用法。 cannot but后跟不定式连用，是一种较正式的用法，主要用于美国英语。 cannot help but跟动词不定式连用，是cannot but与cannot help的混用，系书面用语，多用于美国英语。由于cannot help but含有双重否定，所以有人反对使用，认为不合习惯，但此表达法已经沿用下来。


三、参考例句：


You cannot help but respect them.

你不得不尊敬他们。


We cannot help but admire his courage.

我们情不自禁地钦佩他的勇气。


If you cannot help worrying, then remember worrying cannot help you either.

庸人自扰，无济于事。


I cannot help worrying to hear that there is no steamer this week.

我听到本周没有船的消息，禁不住担忧起来。


One cannot help being old, but one can resist being aged.

一个人无法不变老，但是他可以抵制衰朽。


If we want to live a peaceful and democratic life, we cannot help object to war.

如果我们要过和平与民主的生活， 一定要反对战争。


The joke is so interesting that you cannot help laughing after listening to it.

那个笑话太有趣了，听了真叫人忍俊不禁。


I cannot help admiring his courage.|| I cannot but admire his courage.

我对于他的勇气不胜佩服。


Their slang for someone who tells a joke so badly, that is so unfunny you cannot help but laugh out loud.

当有不善于讲笑话的人讲了个一点也不好笑的事情，而你却又不得哈哈大笑时，就可以用这个当地俚语来形容。


Since I arrived in the United Kingdom, the birthplace of the World Wide Web, I cannot help recalling a touching moment at the opening ceremony of the 2012 London Olympic Games.

来到英国这个“www”发明者的故乡，让我不禁想起2012年伦敦奥运会开幕式上动人的一幕。