when是什么词性 when的词性
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when词性有副词、介词、连词和名词四种。
when，英语。
[英][wen] [美][wɛn]
adv.什么时候; （用于时间的表达方式之后）在那时; 其时; 当时;
conj.在…时; 既然; 如果;
pron.什么时候; 那时;
n.时间，时候; 日期; 场合。
扩展资料
1、[adv.]
(1)[疑问副词]什么时候，何时，在什么情况下；
用于疑问句首，如 When do you begin your classes?
(2)从前，以前；当年: When you were a child, you didn't know what it means.
(3)在……时候：His wife always complains when he smoke.
(4)[关系副词]彼时，其时:Where when he knows wrong, he doesn't admit.
2、[conj.](常用于连接两件事)
(1)什么时候：He told us when to eat.
(2)届时，在那时：He came at six, when the sun was setting.
(3) 是……的时候了：He came at a time when we needed help.
(4)当……时，在……的时候：When we are at college.
(5)每逢，每当：She smiles when you praise her.
(6)相反，而，却：To complain of one's lot when one might change it.(本来可以改变自己的命运，却自怨命苦。)
(7)既然，鉴于：How can he help when they won't let him.
3、[pron.]
什么时候(常用于定语从句)：It was in the morning, when he died.
4、[n.]
时间：When in doubt, leave out.
when：主要用作副词、连词、代词。
一、副词：
1、疑问副词，意为“什么时候；何时”。
2、作连接副词，引导名词性从句或不定式，意为“什么时候”。
3、作疑问代词，常和介词since，till，up to等连用，意为“什么时候”。
4、作关系副词，引导限制性定语从句和非限制性定语从句。
二、从属连词，引导状语从句
1、表示时间，意为“当……时；在……的时候”。
2、表示前面的叙述所没有提到过的信息，它总是对所描述的事件予以引人注目的强调，意为“这时；突然”。
3、表示条件，相当于if，引导条件状语从句。
4、表示对比A、相当于whereas，while，since，意为“既然；然而”。
5、由when等引导的状语从句，如果主语与主句的主语一致或是it，谓语动词又含be动词时，主语和be动词常常被省略，就变成“when + V-ing/ V-ed/ adj/介词词组”的结构。
短语搭配
Remember When记得当时；曾几何时；记妥当时
Say When酒斟够了请说一声；够了就说；够了就请告诉我
When all此时；当所有
When Rendering只有在最后渲染时才重新计算更新效果；渲染时
Use When何时用；什么时候用
Since when从什么时候开始；从何时开始；什么时候开始；从什么时候
When young年轻的时候；年轻时；那时年少；那时少年
When empty什么时候有空；何时空；在空置；当空
以上内容参考 百度百科—when
1、[adv.]
(1)[疑问副词]什么时候，何时，在什么情况下；
用于疑问句首，如 When do you begin your classes?
(2)从前，以前；当年: When you were a child, you didn't know what it means.
(3)在……时候：His wife always complains when he smoke.
(4)[关系副词]彼时，其时:Where when he knows wrong, he doesn't admit.
2、[conj.](常用于连接两件事)
(1)什么时候：He told us when to eat.
(2)届时，在那时：He came at six, when the sun was setting.
(3) 是……的时候了：He came at a time when we needed help.
(4)当……时，在……的时候：When we are at college.
(5)每逢，每当：She smiles when you praise her.
(6)相反，而，却：To complain of one's lot when one might change it.(本来可以改变自己的命运，却自怨命苦。)
(7)既然，鉴于：How can he help when they won't let him.
3、[pron.]
什么时候(常用于定语从句)：It was in the morning, when he died.
4、[n.]
时间：When in doubt, leave out.
关系副词
望采纳
是疑问副词
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