定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名
词性成分，相当于形容词，所以又称为形容词性从句，一般紧跟在它所修饰的先行词后
面。
定语从句又分为限制性定语从句和非限制性定语从句。限制性定语从句对被修饰的
先行词有限定制约作用，使该词的含义更具体，更明确。限制性定语从句不能被省略，
A.which
A.which
B.who
B.who
C.that
C.where
D.whom
D.that
4.I paid a visit to compony last month, ＿＿＿ C. my brother are working. 5.The car accident happened in 1990, ＿＿＿ B. I was a six-year-old child.
彼得现在回巴黎了，你在伦敦见过他。
The boy, whose father is an engineer, studies very hard.
那位小男孩学习很努力，他的父亲是位工程师。
2-2 The defination
非限定性定语从句起补充说明作用，在句子中不充当成分，缺少也不会影响
全句的理解，它与主句往往用逗号隔开。
Grammer
非限制性定语从句
Non-restrictive Attributive Clause
Step1 Revision
目录
Contents
Step2 Lead-in
Step3 The Grammer
Step4 Summary
01
Part One Revison
1-1 The Attributive Clause
否则句意就不完整。
1-2 Exercise
1.That is the day ＿＿＿ A. I'll never forget.
A.which B.on which C.in which D.when
A. 2. The place _______interested me most was the Children's Palace.
eg：The boy, whose father is an engineer, studies very hard.
3-1 The choice of the relatives
4.which引导
关系代词which在非限制性定语从句，中所指代和修饰的可以是主句中的名词、形 容词、短语、其他从句或整个主句，在从句中作主语、动词宾语、介词宾语或表语。
A.which B.who C.whom D.when
A. in fact they 2.The two policemen were completely trusted，＿＿＿ were.
A.which B.who C.whom D.that
3-2 Exercise
3.When deeply absorbed in work，＿＿＿ A. he often was，he would forget all about eating and sleeping.
3-1 The choice of the relatives
5.when引导 关系副词when在非限制性定语从句中作时间状语，指代主句中表示时间的词语。 eg：He will put off the picnic until May 1st, when he will be free.
6.where引导
副词where在 eg：They went to London，where they lived for six months.
此外还有as引导的非限制性定语从句和介词＋关系词的特殊结构，我们将在下节课
中进行讲解。
3-2 Exercise
B. 1.My gardener，_______is very pessimistic，says that there will be no apples this year.
3-1 The choice of the relatives
(2) which指代主句中的形容词。
eg：She was very patient towards the children，which her husband seldom was.
(3) which指代主句中的某个从句。
eg：He said that he had never seen her before，which was not true. (4) which指代整个主句。 eg：In the presence of so many people he was little tense, which was understandable.
02
Part Two Lead-in
2-1 Example sentence
Our guide，who was a French Canadian，was an excellent cook.
我们的向导，一个法裔加拿大人，擅长于烹调。
Peter, whom you mey in London, is now back in Paris.
3-1 The choice of the relatives
1.who引导
eg：Our guide，who was a French Canadian，was an excellent cook. 2.whom引导，关系代词whom用于指人，在句中作动词宾语和介词宾语，作介词宾
语时，介词可位于句首。
非限制性定语从句是先行词的附加说明，去掉了也不会影响主句的意思，它 与主句之间通常用逗号分开，将非限定性定语从句放在句子中间，其前后都 需要用逗号隔开。
2-3 The differences
The differences Restrictive attributive Clause and Non-R estrictive Attributive Clause
eg：Peter, whom you met in London, is now back in Paris. Mr Smith，from whom I have learned a lot，is a famous scientist. 3.whose引导，whose是关系代词who的所有格形式，在从句中作定语。whose通常 指人，也可指动物或无生命的事物。
A.which B.when C.where D.that
04
Part Four Summary
Summary
非限制性定语从句 关系词的分类与选 非限制性定语从句 与定语从句的区别 择 关系词which的用 法
02
01 03
Summary
Thank You
A.which B.where C.in which D.what
B. st summer we visited the West Lake, ______Hangzhou is famous in the world.
A.for that B.for which C.in which D.what
(1)which指代主句中的名词，被指代的名词包括表示物、婴儿或动物的名词、表示
单数意义的集体名词以及表示职业、品格等的名词。 eg：These apple trees，which I planted three years ago，have not borne any fruit. Water，which is a clear liquid，has many uses.
限制性定语从句对被修饰的先行词有限定制约作用，使该词的 含义更具体，更明确。限制性定语从句不能被省略，否则句意就不 完整。非限制性定语从句与先行词关系不十分密切，只是对其作一 些附加说明，不起限定制约作用。如果将非限制性定语从句省去， 主句的意义仍然完整。.
03
Part Three The Grammer