Question

there is a book ___ belongs to Tom用什么引导词？

Answer 1

引导词可以用that或which。
定语从句用关系代词who、whom、whose、which、that或关系副词where、why、when引导。关系词必须紧接在先行词的后面，不应远离，否则无法确定相互关系，但是有时也会看到下列句子。
There was an old man in the apartment who was very rich.
I met two girls, one of whom is my cousin.
关系代词作直接宾语时可以省略。
These are the sneakers my brother bought.
但做主语、表语时不能省略。
He who laughs last laughs best.
He isn't the man that he was.
注意，先行词为疑问词who或which时，限制性定语从句的关系代词只能用that引导。
Who that has seen the photos of starving children doesn't want to help them?
Who that you have seen can beat him in chess?
Which was the bag that you left on the train?
但先行词为that、those时，定语从句只能用who、which来引导。
What's that which you asked for?
Chance favors only those who know how to court her.
关系代词紧接在介系词后面时，不能用who或that，只能用宾格的which或whom（即关系代词该用谁就用谁）。
The woman of whom you are speaking is our chancelor.
The train for which I am waiting is now half an hour late.
This is the new desk, the book on which is hers.
如果先行词是不定代词，关系代词只能用that。
All that students have to do is study hard.
Does "whisper" mean saying something that is not clear?
She hates everything that is modern.
I won't go to any university or college that is located in the suburbs.
如果先行词前出现了形容词最高级、the only、the very、the same和序数词，引导限制性定语从句的关系代词只能用that。
He is the only person that was present at the time.
Today is the coldest day that we have experienced.
Is this the very first aerobics class that you have ever attended?
The last thing that I want to do is to learn English.
在非限制性定语从句中，则不能用that，而要用who或which，作宾语用的代词也不省略，which引导的定语从句可以修饰前面的整个主句。
I, who am your best friend, will certainly help you.
My father fell ill on May 2, 2010, which ended my dream to go to college.
I told him to go to a doctor, which advice he took.
She is studying English, which language is very important in the twenty-first century.
James was seriously sick, which she didn't know.
They thought him dull, which he wasn't.
关系代词whose是属格，引导定语从句，既可指人，也可指物。
I know a boy whose father is a journalist.
I know a girl whose mother is a doctor.
Look at the house whose roof was broken.
The student whose composition I read writes well.
I have a book of rare value, a lot of whose pages are dog-eared.
A teacher is a person whose duty is to teach.
Linda had just bee delivered of twin boys, whose father Mark seems to have been. （这里的whose father可以改成the father of which，注意用the father of which表达时，必用定冠词the，另外，婴儿常常被当作中性的事物看待）
但是，of which前面如果是数词、不定代词或其它限定词时，则不能用whose表示。
He bought some apples, two of which he gave her.
There are six possibilities, evey one of which involves difficulty.
He now has twenty thousand acres of land, more than two-thirds of which are under cultivation.
如果有两个以上的先行词，兼指人和物，要用that。
Take a look at the man and his dog that are coming this way.
He was watching the children and parcels that filled the car.
关系代词that前面不能用介系词，要把介系词放到句尾。
Have you seen the movie that I told you about?
The woman that you are speaking of is our chancellor.
The train that I am waiting for is now half an hour late.
关系代词which、whom可以与不定式和介系词连用。介系词加which可以后接动词不定式短语作定语。
They need a frame on which to grow.
He hasn't reached the proper age at which to marry.
He has a knife with which to defend himself.
that可以表示原因或方式。
That was the reason that I decided not to go to college.
That was the way that he solved the problem.
as作关系代词，在限制性定语从句中与such、same连用，可以指人或物。在非限制性定语从句中代替整个主句。
I don't believe such stories as he tells.
This is the same book as I read last week.
He was a foreigner, as I knew from his accent.
The two brothers were satisfied with the decision, as was agreed beforehand.
He went bankrupt, as I predicted.
Life is but a dream, as a poet points out.
The earth, as is known to all, is round.
He didn't have any hope of success, as he knew.
Oil and water don't mix, as we all know.
He stayed late into the night, as is often the case.
but作关系代词，引导定语从句，表示否定意义，先行词可以指人或物，只用于限制性定语从句。
There is no mother but loves her children.
There is no rule but has some exceptions.
在带有比较级的先行词后面，than可以作关系代词。
The boy has eaten more food than is good for his health.
Never give him more money than is necessary.
关系副词when、where、why在从句中分别作时间状语、地点状语和原因状语。
He left this hometown in 2012, since when he has never come back.
The bookstore where his sister works is the largest in New York.
That was the reason why I decided not to go to college.
that也可以代替关系副词。
Little do I remember the day that I first met her.
I don't like the way that he talks.
That was the reason that I decided not to go to college.
how不能作关系副词，只能作缩合连接副词用。
That was how the riot happened.
That was how he solved the problem.
不能说：
That was the way how he solved the problem.
限制性定语从句指特定的人或物，不可省略，否则句子意思不完整或不清楚，紧跟先行词，和先行词之间一般不加逗号，可以用that，作宾语时关系代词可以省略，翻译的时候是“……的”一句话。
These are the sneakers that my brother bought.
They had two daughters who became actresses.
I have a friend who lives in Paris.
I know a boy whose mother is an English teacher.
I asked the professor who would be sent abroad.
This is the ax that I lost.
This was the reason why I decided not to go to college.
This is the only bow tie that there is in the store.
非限制性定语从句只作补充或说明，省略掉时句子的意思也是完整的，用逗号和先行词隔开，不能用that，翻译的时候往往是两句话。
The old man has a son, who lives in New York.
I have an aunt in Washington, who never writes.
Water, which is a clear liquid, has a lot of usages.
希望我能帮助你解疑释惑。

Answer 2

there is a book _ which__ belongs to Tom