非限定性定语从句在句子中起补充说明作用，不充当句子成分，其缺失不会影响全句理解。它与主句间通常用逗号隔开，分为限制性和非限制性两种。

限制性定语从句是主句成分不可或缺的部分，去除后主句意思往往变得不明确。而非限制性定语从句为附加说明，主句不包含它也能保持完整含义。通常情况下，非限定性定语从句放置于句子中间，前后需用逗号分隔。

分类及示例

who引导

Our guide, who was a French Canadian, was an excellent cook.

Our guide was a French Canadian, and he was an excellent cook.

whom引导

关系代词whom用于指人，常作动词宾语或介词宾语。例如:

Peter, whom you met in London, is now back in Paris.

Our new friend, whom we met at the party, is a professional photographer.

whose引导

whose常指代人，有时也指动物或无生命物。例如:

The boy, whose father is an engineer, studies very hard.

The house, whose roof was damaged in the storm, needed repairs.

which引导

关系代词which可以指代主句中的名词、形容词、短语、其他从句或整个主句。例如:

These apple trees, which I planted three years ago, have not borne any fruit.

Water, which is a clear liquid, has many uses.

He may have acute appendicitis, which in that case will require surgery.

when引导

关系副词when作为时间状语，指代主句中的时间词语。例如:

He will put off the picnic until May 1st, when he will be free.

where引导

副词where作为地点状语，指代主句中的地点词语。例如:

They went to London, where they lived for six months.

as引导

as引出非限定性定语从句时，可以概括整个主句。例如:

As it is known to everyone, I thought you knew about it too.

特殊结构

"名词/代词+of+which/whom/who"

It now has 20，000 hectares of land，more than two-thirds of which are under cultivation.

Light is the fastest thing in the world, the speed of which is 300,000 kilometers per second.

"介词+关系代词"引导非限制性定语从句

Without whose support they would not have succeeded.

Without the help of the local community, the project would not have been completed.

本文地址： http://www.goggeous.com/c/1/1148615

文章来源：天狐定制

版权声明：除非特别标注，否则均为本站原创文章，转载时请以链接形式注明文章出处。