►指人的关系代词：who, whom, whose, that 的用法：
(1) 作主语(who, that )
Those who are going to play in the match are to meet at the gate at 1:30 after lunch.
在本句中，先行词是those;关系代词who引导定语从句，同时代替先行词在从句中担任动词are going to play 的主语。
The man who/that is talking with Mr. Wang is a famous doctor.
在本句中，先行词是the man;关系代词who/that引导定语从句，同时代替先行词在从句中担任动词is talking的主语。
这个复合句可以还原成两个句子：The man is a famous doctor. He is talking with Mr. Wang.
(2) 作宾语包括作介词宾语(whom, that )。此种情况下的关系代词可以省略;
This is just the man (whom/that) I want for the job.这正是我要的做这份工作的人。
在本句中，先行词是the man;关系代词whom/that引导定语从句，同时代替先行词在从句中担任动词want 的宾语。
Is he the manager (whom/that) you are looking for?
如：The book from which I got a lot of useful information was written by a famous scientist.
Who is the boy with whom you were talking a moment ago.
I know the young couple from whose house the music is coming.
This is the instruction manual which/that tells you how to operate the computer.
The chair (which /that) you broke yesterday is now being repaired.
The film (which/that) I saw last night was about a soldier who fought in WWII.
This is the bike for which I paid $ 100.
The car (which/that) he went in was a black Cadillac.
The accounts of the company, (which/that) I’ve been paying great attention to, are in balance.
和of which 指代人或事物，作定语。of which 可用whose 代替;
The car whose lights (of which the lights/the lights of which) were all broken was my father’s.
例：His house of which the windows (the windows of which /whose windows) were all broken was a depressing sight.
That is the book whose cover (of which the cover/the cover of which ) was broken.
如：Peter is the one who everybody believes will fail to bring off the contract. Peter 是那个人人都认为不能完成合同的人。(everybody believes 是插入语)
At the election I voted for the man whom I believed to be the most suitable.
例：These are the operating instructions that/which are written in English 。
Are you staying at the white house which/that is newly completed and which /that has 15 bedrooms, 3 kitchens and 4 toilets?
So far as I know, there are many VIPs who are going to attend the reception.
例：Her brothers, both of whom work in America, ring her up every week。
The buses, most of which were already full, were surrounded by an angry crowd，
That tower block, which cost five million dollars to build, has been empty for five years.
Cricket, which I know very little about, is a very popular sport in England。
The accounts of the company ,which I’ve been paying great attention to, are in balance.
例：I shall never forget the day when (=on which) we first met.