作业帮为什么when在引导表语从句和定语从句中是副词在时间状语从句中是连词?
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 11:35:49
为什么when在引导表语从句和定语从句中是副词在时间状语从句中是连词?
为什么when在引导表语从句和定语从句中是副词在时间状语从句中是连词?
为什么when在引导表语从句和定语从句中是副词在时间状语从句中是连词?
when除了用来引导主语从句、宾语从句、时间状语从句、表语从句和定语从句,可以为副词、连词、代词,根据不同用法而定.
下面是when的不同词性用法,差别还是挺大的,看下例句,就能感受出来.
语法没有为什么,就是这么用的,应用熟练就好了.
adv副词,conj连词 pron 代词
when:
(1) adv.什么时候,何时 at what time
[例句]
When can you come to see me?
你什么时候来看我?
(2) adv.是…时候at which;on which
[例句]
Please tell me when we'll have the meeting.
请告诉我我们什么时候开会.
(3) adv.在…的时候 at or during which
[例句]
How I regretted the days when I had played and should have studied!
我多么懊悔我本该好好学习却玩掉了的那么多的日子!
(4) adv.那时 but at that moment
[例句]
It happened on a day in November when the weather was very wet and cold.
这事发生在十一月的一天,那时天气又潮湿又寒冷.
We were about to start,when it began to rain.我们刚要出发时开始下雨了.
(5) conj.当…时 at the time when
[例句]
It happened when I was living in the country.事发生在我住在农村的时候.
It was raining when we arrived.我们到达时,天正下着雨.
(6) conj.一…就 immediately after
[例句]
When I had finished dinner I went to bed.
我吃完饭就睡觉了.
Let us set out when the sun has risen.太阳一出来,我们就动身.
(7) pron.（关系代词）那时
which time
[例句]
I came here in 1949,since when I have been engaged in this work.
我1949年到这里,从那时起我就担任这项工作.
We came a week ago,since when the weather has been bad.
我们在一星期前来此,从那时起天气就一直不好.
(8) pron.（疑问代词）什么时候
what time
[例句]
Since when have you been here?你从何时起在此地?
Until when can you stay?你能呆到什么时候?