在定语从句中何时用：介词+wh....型式？？

定语从句中，什么时候用介词+which~

1、定语从句用which情况：
1，非限定性定语从句
2.关系代词前有介词
3.关系代词后有插入语
如：
1、The
sun
heats
the
earth
,
which
makes
it
possible
for
plants
to
grow
.
2、The
bodies
on
which
the
forces
act
are
in
equilibrium．
3、Here
is
the
English
grammar
book
which,as
I
have
told
you
will
help
improve
your
English.
2：如果第二个问题问的这两个短语还是与定语从句有关的话，那
so后面都加形容词，that后面加句子，as后面加名词。如：The
biscuits
are
so
delicious
that
I
want
to
eat
more.
订攻斥纪俪慌筹苇船俩The
food
is
not
so
good
as
those
we
ate
in
Bill's
home.
so...as用于否定句，和as...as意思一样。后者肯定句否定句都能用。
希望能帮到您！

一般来说关系副词=介词+关系代词
如：why=for which
where=to which
when=during which
whose=of which
具体加什么介词，视情况而定。
1句中，用on比较好：4句中，用during比较好。
当定语从句所修饰的先行词是表示时间的名词时，用when，在定语从句中充当时间状语。在口语中可以用that代替when，也可以用介词+which来代替when。
当定语从句修饰表示地点的名词时，用where，在定语从句中充当地点状语从句。
当定语从句所修饰的词是表示原因的词，用why，在定语从句中作原因状语。
当定语从句先行词与从句中某个名词有所属关系，表达“……的”意思时，用关系代词whose 引导定语从句，它既可以指代人，也可以指代物。指物时用of which，指人时用of whom。

介词＋关系代词”引导定语从句是我们学习定语从句的重点，也是高考的常考点。学习这种从句应注意以下几点：

1. 用于这种情况的关系代词一般为which（指物）和whom（指人）。在这种结构中，介词的选择非常关键，可以遵循以下四个原则：

（1）根据定语从句中的谓语动词确定介词，其动词与介词搭配，构成动词短语。例如：

Is this the car for which you paid a high price? （pay for）这是你花大价钱买的车吗？

In the dark street, there wasn’t a single person to whom she could turn for help. （turn to sb. for help）在黑暗的街上，她找不到一个人来帮助她。

The man with whom you shook hands just now is our English teacher. （shake hands with sb. ）刚才你和他握手的那个人是我们的英语老师。

（2）根据定语从句中的形容词确定介词，其形容词与介词搭配，构成形容词短语。例如：

The two things about which Karl Marx was not sure were the grammar and some of the idioms. （be sure about）马克思没有把握的两件事是：语法和习惯用法。

The teacher with whom the students in our class are popular is Mr Wang, our English teacher. （be popular with）在我们班，深受学生欢迎的是王老师－－我们的英语老师。

（3）根据定语从句修饰的先行词确定介词，其先行词往往是表示时间、地点、原因、方法、工具等的词，它们与介词之间有一定的联系。当“介词＋关系代词”在定语从句中充当时间、地点、原因状语时，可分别用when, where, why替换。例如：

I’ll never forget the day on which （= when ）I joined the army. 我永远也忘不了我参军的那一天。

The factory in which （= where）his father works is far away from my hometown.

他父亲工作的那家工厂离我们家乡很远。

I don’t know the reason for which （＝why）he was late for school. 我不知道他为何上学迟到。

This is the camera with which he often takes photos.

这就是他经常用来拍照的相机。

（4）根据句子的意思确定介词。有些句子，先行词完全一样，定语从句中谓语动词不是由固定的动词短语构成的，这时，要根据句子所要表达的意思，选用不同的介词。例如：

This is the pilot for whom I bought a camera. （意思是：I bought a camera for the pilot. ）这就是我给他买相机的那位飞行员。

This is the pilot with whom my brother has worked for ten years. （意思是：My brother has worked with the pilot for ten years. ）这就是和我弟弟一起工作了十年的那位飞行员。

This is the pilot by whom my son was saved. （意思是：My son was saved by this pilot. ）这就是救了我儿子的那位飞行员。

2. 介词若与从句中的动词词组有关，可前置于关系代词前，也可置于动词后，但若此介词与动词为固定词组，则此介词一般不前置。例如：

Yesterday we paid a visit to the house in which Lu Xun lived.

→Yesterday we paid a visit to the house which Lu Xun lived in.

昨天，我们参观了鲁迅的故居。

This is the very pen that I’m look for. （look for为固定词组，则介词for不可前置。）那就是我正在找的那支钢笔。

3. 限定性定语从句中，介词前置时，关系代词不能用that，且不能省略；若介词后置，则可以用that，也可以省略。例如：

This is the school in which I studied 3 years ago.

→This is the school（which / that）I studied in 3 years ago.

这就是三年前我学习的那所学校。

4. 表示所属关系时，介词应用of，关系代词为which / whom, 即n. + of + which / whom，可转换为whose+ n. 。例如：

He lives in a room, the window of which faces west.

→He lives in a room, whose window faces west.

他住的房间，窗子向西开着。

The child was saved by a man, the name of whom was not known.

→The child was saved by a man, whose name was not known.

这个孩子被一位不知姓名的男子所救。

5. 表示整体中的一部分或……中最……的，介词一般也用of。例如：

The Greens have two daughters, both of whom are college students.

格林夫妇有两个女儿，她们都是大学生。

China has many rivers, the longest of which is the Yangtze River.

中国有众多河流，最长的是长江。

which啊
WHEN=ON WHICH
WHERE=IN（或者其他） WHICH
====

一般用于非限定性定语从句中。当主句动词为不及物动词，需要接介词时，则可将该介词放于从句中，与wh...联接词连接。

例：
This is the pen with which i wrote the compisition.
我就是用这支笔写文篇的。

状语的时候，比如地点状语in+地点，方式状语in/with+方式等等

1.关系代词which,whom 在定语从句中作介词的宾语时，从句常由“介词+which/whom”引出
Great changes are taking palce in the city in which they live.
2.这类从句中的介词也可放在从句的末尾，这时关系代词可以省略
The situation (which) we had got into was very dangerous.
3.定语从句也可由“名词/代词/数词+介词+which/whom”引出
The house the windows of which were damaged has now been repaired.

介词+关系代词时， 通常是先行词较泛指时用， 而相应的关系副词则是在先行词较具体时使用

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