放句首或句中引导从句,只能用as(如例4,5);
从句在句末,无其他限制条件时,既可用which,也可用as(如例3)。
句型模式为:as …;主语+ 谓语;主语, as…, 谓语;主语+ 谓语,as/which… 10 3.从固定搭配角度:
在引导词+be +done 结构中省略be时,只能用as(如例7);
常见固定用法as is well known, as is often the case, as often happens, as has been said before, as has been pointed out, as can be seen等常用as(如例2,8 )。 4.从定语从句的肯、否定意义角度:
从句内容为否定意义时,常用which(如例6)。
其他情况可互换(如例3)。 10
填写定语从句的引导词 1. This is the teacher__________ I often ask advice on how to improve my English. 2. I have never come across such a situation ________ customers have to pay in cash. where
where 11 关系副词where前面的先行词是否一定为地点名词? 3. 0℃ is the freezing point ________ water turns into ice. 4. A party is an occasion ____________________ participants should dress formally. 5. This is a rare case_______ lost money can be found again.
where
when / where/on which
where 11 关系副词where前面的先行词是否一定为地点名词?
当先行词表达的意义为处所,程度,状态,情况时,引导词的确定需要采用“还原搭配”原则。上述五个定语从句可还原为: 1. I often ask advice on how to improve my English from the teacher. 2. Customers have to pay in cash in such a situation. 3. Water turns into ice at the freezing point. 11
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