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when放在开头是什么词性

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when放在开头是什么词性

when放在开头时是副词词性

例句

1、

When will the single currency be operable?

什么时候实行单一货币

2、

When's food? I'm starving!

饭什么时候好我快饿死了!

3、

When do the fireworks start?

什么时候开始放烟火

4、

When will the information be made available?

何时才可以了解到情况

when放在开头是什么词性

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放在开头是什么词性

when可当疑问副词,也可当关系副词.1. when当疑问副词, 一定是放在句首.例: When is the play going to start? 这场戏什麼时候要开始?当关系副词, 用来修饰表时间的先行词, 可用来代替"时间介系词+which",如" at which, in which"例: Do you remember the day THAT I invited you out? 记得我邀你出去的那一天吗? =Do you remember the day WHEN I invited you out? =Do you remember the day ON WHICH I invited you out? =Do you remember WHEN I invited you out? (这里的when引导名词子句作受词用) (当.....) 主要用於强调事情发生的时间. 用在句首或句中意思并没有差别例: When her name was called, she stood up. = She stood up when her name was called. 叫她名字的时候,她站了起来.但注意, when在句首, 两个句子之间要用逗号隔开, when在句中, 就是一个句子.