关于一个句子的疑惑看到一个非限制性定语从句：She married him,which was unexpected.＝She married him,as（was） unexpected.有解释说此句中which、as可互换；但也曾在别的地方看到过同样的句子,却是特别

关于一个句子的疑惑看到一个非限制性定语从句：She married him,which was unexpected.＝She married him,as（was） unexpected.有解释说此句中which、as可互换；但也曾在别的地方看到过同样的句子,却是特别
关于一个句子的疑惑
看到一个非限制性定语从句：She married him,which was unexpected.＝She married him,as（was） unexpected.有解释说此句中which、as可互换；但也曾在别的地方看到过同样的句子,却是特别强调此句中不可用as引导从句,只能用which——因为as引导的非限制性定语从句必须应与主句在意义上和谐一致,或表达“情理之中,顺理成章”的意思,不能是负面的,出乎意料的或是与主句逻辑发展趋势相抵触,一定要natural一点,而不能unexpected.
各自有理,到底谁对?
请看清提问再作答，请不要罗列网上现有的大篇幅解释！

关于一个句子的疑惑看到一个非限制性定语从句：She married him,which was unexpected.＝She married him,as（was） unexpected.有解释说此句中which、as可互换；但也曾在别的地方看到过同样的句子,却是特别
看到一个非限制性定语从句：She married him,which was unexpected.＝She married him,as（was） unexpected.有解释说此句中which、as可互换；但也曾在别的地方看到过同样的句子,却是特别强调此句中不可用as引导从句,只能用which——因为as引导的非限制性定语从句必须应与主句在意义上和谐一致,或表达“情理之中,顺理成章”的意思,不能是负面的,出乎意料的或是与主句逻辑发展趋势相抵触,一定要natural一点,而不能unexpected.
各自有理,到底谁对?
答：做题造句,一定要注意句子的逻辑意思.
She married him,as had been expected.她嫁给了他,正如大家所估计的那样.
She married him,which was unexpected.她嫁给了他,这大家可没有想到.
后一句,不能用as,不信你翻译出来试试?

which与as引导非限制性定语从句的异同
which与as一样，都可以引导非限制性定语从句，它们既有相同之处，也有差别。因此在实际运用中容易混淆。它们的某些用法在高考中也会考查。
一．相同点。
两者引导非限制性定语从句时，可指代主句中的部分或整个句子的内容，在从句中做主语，宾语或表语，位于主句之后有时可互换。
The meeting was put off, as...

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which与as引导非限制性定语从句的异同
which与as一样，都可以引导非限制性定语从句，它们既有相同之处，也有差别。因此在实际运用中容易混淆。它们的某些用法在高考中也会考查。
一．相同点。
两者引导非限制性定语从句时，可指代主句中的部分或整个句子的内容，在从句中做主语，宾语或表语，位于主句之后有时可互换。
The meeting was put off, as /which was exactly what we wanted.
He was a doctor,as/which I knew from his manner.
不同点
1. as可指其前后主句提到的事实或情况，因此引导的非限制性从句位置比较灵活，as可以放在主句前后，也可插入主句之中；而which引导的非限制性从句只能位于主句之后。
As is known toall, fish can’t live without water.
Air, as we know,is gas.
2.在非限制性从句中，which后的be动词不可省；as而后的be动词可以省略。
She told me shewon the match , which was a lie.
The material iselastic, as (was) shown in the figure.
3. which在非限制性定语从句做主语时可用各类动词做谓语；而在非限制性定语从句做主语时，谓语常用连系动词，如be, seem, become等，一般不用其他行为动词。
He saw the girl,which delighted him.
He didn’t sayanything at the meeting , as/which seemed very strange.
4. 如果主句中叙述的事情与从句所涉及的意向一致，多用as，用以对主句的意义进行补充；如果不一致，就用which
She has married again, as was expected.
He broke the rules again, which was unexpected.
5.如表示“如同。。。那样，按照，正如”含义，常用as，这里as主要起与上下文联系的作用，表达说话人的看法，并指出内容，出处和根据等，常用的结构有as we know（众所周知）asoften happens（正如常发生的那样）as is often the case（情况常常如此）as we all can see（正如我们看到的）be+announced/expected/known/imagined/mentioned/said/shown/reported（正如所。。。）等。这些结构常放句首，偶尔也可以放句中或句末
As is known to all, China is a developing country.
Kate was late forschool , as often happened.
6.在非限制性定语从句中关系代词指代主句中某一个单词时，常用which
My brother enjoyedplaying basketball , which he really plays well.
Beijing , which he was born in, is our capital.
7.在非限制性定语从句中“介词+关系代词（介宾代物）”中关系代词只能用which
The Travel Agency, with which our company has been dealing for several years, has opened for new branches
Air is a mixtureof gases, of which oxgen forms 21 percent.
8.有时用case, point, time, situation或reason等抽象名词来总结主句的内容，可用“介词+ which +抽象名词”构成从句
Ten years of hard work changed her greatly , for which reason he could hardly recognise her at first sight.
The machine may beout of order , in which case it will be repaired at once.
9.在非限制性定语从句关系代词用以代表主句中谓语的整个概念，从句中的谓语动词是否定形式时，常用which
He can write aletter in English, which I can not.
Metal will bearbeating with a hammer, which a stone willl not
10.在非限制性定语从句关系代词代表前面主句中的宾语从句时，常用which
He said he hadpassed the exam , which was untrue.
这些都是教程内容。

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这里只能用which 非限中如果从句含有否定前缀构成的词（unexpected）则只能用 which 你是高中生吗 这个which和as的区别在高考五三中就详细列举 买一本好好看看 至少看三遍 语法很全面

As与which引导非限定性定语从句的区别：
1、which引导的从句不能放在主句前，而as引导的从句则既可以放在主句前，也可以放在主句后。
As we all know, he studies very hard. (as 指代整个句子，作宾语，置于句首)
Taiwan is, as you know, an inseparable part of Chin...

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As与which引导非限定性定语从句的区别：
1、which引导的从句不能放在主句前，而as引导的从句则既可以放在主句前，也可以放在主句后。
As we all know, he studies very hard. (as 指代整个句子，作宾语，置于句首)
Taiwan is, as you know, an inseparable part of China. (as指代整个句子，作宾语，置于句中)
2、用能做关系代词，as和which都可以指代一个句子，但as有“正如”、“就像”之意，which则没有此含义。
He is a foreigner, as I know from his accent. (as指代一个句子，意为“正如”、“就像”)
3、当从句的谓语动词是be或相当于联系动词的seem, become等时，可用as或which作主语。但当从句的谓语是行为动词时，只能用which作主语。
He liked the girl,as was / seemed natural.
He liked the girl,which delighted him.

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She married him, which was unexpected. 句中的which指she married him这件事，不能换成as。
She married him unexpectedly.

She married him which was expected.
She married him as expected.
楼主的意思是否说：as引导的非限制性定语从句不能带否定之意？

都不准确 应该以下面作为判断标准

as 和which在引导非限制性定语从句时，这两个关系代词都指主句所表达的整个意思，且在定语从句中都可以作主语和宾语。但不同之处主要有两点：
(1） as 引导的定语从句可置于句首，而which不可。
(2） as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词；若为行为动词，则从句中的关系代词只能用whic...

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都不准确 应该以下面作为判断标准

as 和which在引导非限制性定语从句时，这两个关系代词都指主句所表达的整个意思，且在定语从句中都可以作主语和宾语。但不同之处主要有两点：
(1） as 引导的定语从句可置于句首，而which不可。
(2） as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词；若为行为动词，则从句中的关系代词只能用which.。

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