as引导什么从句时可以省略主语
2016-06-15 · 全日制系统化外语教学
as解释:conj. 因为;随着;虽然;依照;当…时;prep. 如同;当作;以…的身份
adv. 同样地;和…一样的
当它做连词时,可以引导时间状语从句、方式状语从句、让步状语从句、比较状语从句、原因状语从句。
I wish we could migrate from here every winter, as the birds do! (比较状语从句,主语不省略)
但愿我们能像鸟儿一样,每年冬季从这里定期迁徙!
They couldn't move on as their sledges broke down.(原因状语从句)
他们不能继续前进,因为他们的雪橇坏了
As time went on, many of these first settlers settled down and began to farm and domesticate animals. (时间状语从句,主语不能省略)
随着时间的推移,这些第一批移民的大多数定居下来,开始农耕和驯养动物。
当as引导方式状语从句时,而且主句主语和从句主语是同一人时(表示“正如,就像”),可以省略主语。如
Do as I say, not as told=Do as I say, not as you are told
照我说的去做,别照我做的去做。
Everything goes as expected=everything goes as it is expected
一切像期望的一样进展
当as 引导让步状语从句时,发生倒装,提前的是可数名词单数时,前面的冠词a/an需要省略。如:
Child as he is, he knows a lot of the history of China. (child前面省略了冠词a)
虽然他只是个孩子,他懂得许多中国历史方面的知识。
as都能引导什么从句
定语从句。而且只有as引导的定语从句可以 放在句首。
2.时间状语从句。‘当···时候’
3.方式状语从句。‘按照,如同’
4.原因状语从句。‘由于,鉴于’
5.让步状语从句。‘虽然,尽管’,而且引导让步状语从句是句子要倒装。
倒装句中as和although当尽管讲时的用法
as引导的让步状语从句倒装有四种类型(强调让步内容,as可以用though代替)。现在我来给你讲
第一种:adj+as+主语+be
第二种:名词(特别注意是不带冠词的)+as+主语+be
第三种:adv+as+主语+动词
第四种:动词原形+as+主语+动词或助动词
as, though ,although这三个词的用法各有区别.具体来说,as引导的让步状语从句必须倒装;though引导的让步状语从句可以倒装也可以不倒装;而although引导的让步状语从句不能倒装.
e.g. Hard as he tried, he still failed. (他虽然努力了,但仍然失败了.)
Though he tried hard, he still failed.
Hard though he tried, he still failed.
Although he tried hard, he still failed.
adv. 同样地;和…一样的
当它做连词时,可以引导时间状语从句、方式状语从句、让步状语从句、比较状语从句、原因状语从句。
I wish we could migrate from here every winter, as the birds do! (比较状语从句,主语不省略)
但愿我们能像鸟儿一样,每年冬季从这里定期迁徙!
They couldn't move on as their sledges broke down.(原因状语从句)
他们不能继续前进,因为他们的雪橇坏了
As time went on, many of these first settlers settled down and began to farm and domesticate animals. (时间状语从句,主语不能省略)
随着时间的推移,这些第一批移民的大多数定居下来,开始农耕和驯养动物。
当as引导方式状语从句时,而且主句主语和从句主语是同一人时(表示“正如,就像”),可以省略主语。如
Do as I say, not as told=Do as I say, not as you are told
照我说的去做,别照我做的去做。
Everything goes as expected=everything goes as it is expected
一切像期望的一样进展
当as 引导让步状语从句时,发生倒装,提前的是可数名词单数时,前面的冠词a/an需要省略。如:
Child as he is, he knows a lot of the history of China. (child前面省略了冠词a)
虽然他只是个孩子,他懂得许多中国历史方面的知识。