一、详细释义:


adv.

什么时候,何时,什么情况下,什么场合下


例句:

I'd like to know when they'll let him out.

我想知道他们什么时候放他。


例句:

He asked no odds even when he was Bogged down in great difficulties

即使是在特别困难的情况下,他也从未要求过特殊照顾


(用语时间的表达方式之后)在那时,其时


例句:

The Queen's last visit was in May, when she opened the new hospital.

女王上次来访是在五月份,她那时主持了这座医院的落成典礼.


例句:

I used to eat out in the evenings when my parents were on night shifts.

那时,逢到我父母上夜班,我就在外面吃晚饭。


其时,当时,当场

conj.

在……时候,当……时,在……期间


例句:

Here the local were always barbered at this hour on this day.

原来本地人老是在这一天这个时候这个地方理发。


例句:

Books are her resort when she is lonely.

当她寂寞的时候就看书解闷。


在……之后


例句:

When I mingled with other families I distinctly discerned how peculiarly fortunate my lot was.

在我接触到别的一些家庭之后,我清楚地体会到自己可谓得天独厚的天之骄子。


例句:

She was the first to broach the idea of my escape when we realized the great new tasks.

在我们意识到新的伟大任务之后,是她首先提出了要我逃跑的想法。


在任何……时候


例句:

You can save the game at any time when you're at your bunk.

任何时候你都可以在你的床位储存你的游戏。


一……就,刚……就


例句:

He is prone to lose his temper when people disagree with him.

人家一不同意他的意见,他就发脾气.


考虑到,既然


例句:

Why use wood when you can use plastic?

既然能用塑料,何必非用木料?


例句:

I can' t tell you when you won' t listen.

既然你不想听,我就不告诉你了。


虽然,然而,可是


例句:

I should seem to be rejoicing when I am solemn all the time.

虽然我心里没有一丝笑意,但我还会显得高高兴兴的。


例句:

I stop for crganettes when I already have two packs.

虽然我已经有两包烟了,我还是停下来买。


n.

时间

pron.

什么时候,何时


例句:

Considerate products know when to bend the rules

体贴的软件知道什么时候调整规则


例句:

Since when has she taught here?

她从什么时候开始在这儿教书的?


二、词义辨析:


when,while,as

这些连词均可表示“当……时”引出时间从句。 when所引导的从句,其谓语动词既可是持续动词,也可是短暂动词;谓语动词动作发生的时间可以与主句谓语动词的动作是同时,或之前、之后。 while句中的谓语动词应为持续动词,不用短暂动词,谓语动作发生的时间通常与主句谓语动词动作发生时间是同时。 as侧重指从句与主句的动作同时进行,谓语动词可以是持续性的,可以是短暂性动词。


三、参考例句:


When is your birthday?

你的生日是哪天?


When is Halloween?

万圣节在什么时候?


When is the registration?

登记日是哪天?


When was your birthday?

你的生日是哪天?


When's your birthday?

你的生日是什么时候?


Water vaporizes when boiled.

水沸了就变为蒸气。


When is the party?

派对在什么时候?


Know when to stop.

适当的停顿。


When Pigs Fly.

永无可能。


Tell me when!

随时奉陪!