以前老师告诉我while前后的句子时态都要是ing,也就是进行时,但是我有时候看见由while连接的前后两个句子不一定都是进行时,有时候还都不是进行时,为什么?还有when引导的从句,我一直是以为when连接的前后句子时态必须一致,但是好像不是这样啊。请高手系统的给我讲一下各个连词的用法,还有as这个词我一直不知道怎么用,能否详细解读一下?请不要复制粘贴一些我看不懂的东西,谢谢~
while前后的句子时态不一定都要是ing。
while 可以是从属连词 也可以是并列连词。
当从属连词用时引导状语从句 表示时间 段 。后面跟 延续性动词 或延续性动词的进行时,
主句用一般过去时。
如 while i was reading ,he came in.
当并列连词用 等于and ,表示对比 关系 ,并列两个句子。如 he is a worker ,while his son is a professor.
when也是 当从属连词 和 并列连词 。
引导的从句可以是时间点 ,也可以是 泛指的时间段 。如 when he came in, i was reading.
when i was a child ,i was happy.
当并列连词 用时 表示 突然 的意思。
如 i was walking in the street when i saw a friend of mine.
以上所讲 挂一漏万 供参考。
as 的用法 暂不讲。 ~
while 可以是从属连词 也可以是并列连词。
当从属连词用时引导状语从句 表示时间 段 。后面跟 延续性动词 或延续性动词的进行时,
主句用一般过去时。
如 while i was reading ,he came in.
当并列连词用 等于and ,表示对比 关系 ,并列两个句子。如 he is a worker ,while his son is a professor.
when也是 当从属连词 和 并列连词 。
引导的从句可以是时间点 ,也可以是 泛指的时间段 。如 when he came in, i was reading.
when i was a child ,i was happy.
当并列连词 用时 表示 突然 的意思。
如 i was walking in the street when i saw a friend of mine.
以上所讲 挂一漏万 供参考。
as 的用法 暂不讲。 ~
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第1个回答 2013-05-01
while 引导时间状语从句的时候,一般是这样的,比如:
While John was watching TV, his wife was cooking.
I got home while dad was reading newspaper.
担不全部是。比如:
While he was a young boy, he was always ready to help others.
Will you watch my clothes while I have a swim.
在 while 引导让步从句的时候,不一定用现在进行时:
I like playing football while you like playing basketball.
上面是比较明显的。你有兴趣的话,到下面链接看看吧:
本回答被网友采纳
While John was watching TV, his wife was cooking.
I got home while dad was reading newspaper.
担不全部是。比如:
While he was a young boy, he was always ready to help others.
Will you watch my clothes while I have a swim.
在 while 引导让步从句的时候,不一定用现在进行时:
I like playing football while you like playing basketball.
上面是比较明显的。你有兴趣的话,到下面链接看看吧:
本回答被网友采纳
第2个回答 2013-05-01
关键看该词表达的含义,表示“当...的时候”时三者的区别是as强调“一边...一边...”;while要与延续性动词连用;而when与短暂性动词或延续性动词连用都可以;He took a bath while/ when I was preparing dinner.
Tom returned home when it was midnight.
第一句中I was preparing dinner是延续性动作,所以都可以。
第二句中it was midnight是点时间故只能用when
Tom returned home when it was midnight.
第一句中I was preparing dinner是延续性动作,所以都可以。
第二句中it was midnight是点时间故只能用when
第3个回答 2013-05-01
关系代词as的用法
若定语从句不完整
1.先行词有the same,such,so修饰,关系词用as.
2.先行词是句子,诸如as we all know或as is kowe to all之类的情况用as,此时as引导的定语从句中多含有be动词,而且as引导的定语从句多放在先行词前面。
希望能够帮助到你。
若定语从句不完整
1.先行词有the same,such,so修饰,关系词用as.
2.先行词是句子,诸如as we all know或as is kowe to all之类的情况用as,此时as引导的定语从句中多含有be动词,而且as引导的定语从句多放在先行词前面。
希望能够帮助到你。