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一、在限制性定语从句中
在such或 the same之后常用as 作为关系代词引导定语从句,不用which。
such, the same与as 搭配使用,as充当定语从句的主语或宾语。
1.Have you read such a book as I bought yesterday? (as作宾语)
2.Such tourists as know Guilin think its scenery is superb. (作主语)
3.I once ran into the same trouble as you did years ago. (作宾语)
另外,the same 之后也可以跟that 引导的定语从句表同一关系。
He has been admitted to the same university that his brother studies in.
二、在非限制性定语从句中
(一)as可用在句首或句中,而 which 引导的定语从句只用在句中。
1.As the world know, China successfully hosted the 29th Olympic Games in 2008.
2.The engineer was suddenly kidnapped, which surprised his college.
3.If Ken comes late, as is usual for another time, we will not receive him any more.
(二)which用作关系代词,可用来代指上文某个词也可以代指上文的整个句子,而 as只用来代指整个句子。
1.As was announced, only one of the participants passed the test.
2.The manager held a meeting, which lasted two hours.
(三)在which引导的定语从句中,谓语动词若是am/is/are则这些系动词不能省略;而若是as引导的定语从句,则系动词可以省略。
1.The young girl is a teacher, as (is) clear from her manner. (is可省)
2.He said he had never seen her before, which was not true. (was不省)
(四)作主语时,which 既可以作系动词be的主语也可以作实义动词的主语;而as只作系动词的主语。
1.He grows too fast, which makes him taller than his classmates.
2.Mother doesn’t like watching a comic opera, as/which is strange.
三、在下列情形中常用as不用 which
1.定语从句的谓语由实义动词的被动形式构成
As is reported/announced/expected/said/well known/declared/can be seen/As may be imagined,…
As can be seen, the old man wouldn’t receive any offer.
2.As usually happened, …
As usually happened, the village was again struck by a fierce typhoon last summer.
3.感官动词和意识类动词作定语从句的谓语时。
see, hear, notice, know, learn, realize 等作谓语时,常用as 引导定语从句。
As you realize, he hates women smoking.
4.当定语从句有“如同……那样”含义时,用as 比用which 更常见,而这些从句几乎成为固定用法。
Things will turn out contrary to one’s wishes, as is often the case. 事与愿违,这是常有的事。
在such或 the same之后常用as 作为关系代词引导定语从句,不用which。
such, the same与as 搭配使用,as充当定语从句的主语或宾语。
1.Have you read such a book as I bought yesterday? (as作宾语)
2.Such tourists as know Guilin think its scenery is superb. (作主语)
3.I once ran into the same trouble as you did years ago. (作宾语)
另外,the same 之后也可以跟that 引导的定语从句表同一关系。
He has been admitted to the same university that his brother studies in.
二、在非限制性定语从句中
(一)as可用在句首或句中,而 which 引导的定语从句只用在句中。
1.As the world know, China successfully hosted the 29th Olympic Games in 2008.
2.The engineer was suddenly kidnapped, which surprised his college.
3.If Ken comes late, as is usual for another time, we will not receive him any more.
(二)which用作关系代词,可用来代指上文某个词也可以代指上文的整个句子,而 as只用来代指整个句子。
1.As was announced, only one of the participants passed the test.
2.The manager held a meeting, which lasted two hours.
(三)在which引导的定语从句中,谓语动词若是am/is/are则这些系动词不能省略;而若是as引导的定语从句,则系动词可以省略。
1.The young girl is a teacher, as (is) clear from her manner. (is可省)
2.He said he had never seen her before, which was not true. (was不省)
(四)作主语时,which 既可以作系动词be的主语也可以作实义动词的主语;而as只作系动词的主语。
1.He grows too fast, which makes him taller than his classmates.
2.Mother doesn’t like watching a comic opera, as/which is strange.
三、在下列情形中常用as不用 which
1.定语从句的谓语由实义动词的被动形式构成
As is reported/announced/expected/said/well known/declared/can be seen/As may be imagined,…
As can be seen, the old man wouldn’t receive any offer.
2.As usually happened, …
As usually happened, the village was again struck by a fierce typhoon last summer.
3.感官动词和意识类动词作定语从句的谓语时。
see, hear, notice, know, learn, realize 等作谓语时,常用as 引导定语从句。
As you realize, he hates women smoking.
4.当定语从句有“如同……那样”含义时,用as 比用which 更常见,而这些从句几乎成为固定用法。
Things will turn out contrary to one’s wishes, as is often the case. 事与愿违,这是常有的事。