任何一门语言都有语言学，对于句子而言也是存在句法学，除了词汇概念较复杂外，其句子结构较复杂。句法学与语法有区别吗？小编整理英语句法学与语法相关内容，了解一下。
►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.
那些参加比赛的人午饭后1：30在大门口集合。
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.
正在和王先生说话的那个人是一个有名的医生。
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?
他是你在找的那位经理吗?
(3) 当关系代词紧跟介词作介词宾语时，不能用that，也不能省略，
如：The book from which I got a lot of useful information was written by a famous scientist.
我从中得到许多有用信息的那本书是一位著名科学家写的。
Who is the boy with whom you were talking a moment ago.
你刚才和他说话的那个男孩是谁?
I know the young couple from whose house the music is coming.
►指物的关系代词which和that的用法：
1. 作主语
This is the instruction manual which/that tells you how to operate the computer.
这是那本教你如何操作计算机的说明手册。
2. 作宾语包括作介词宾馆。此种情况下的关系代词可以省略：
The chair (which /that) you broke yesterday is now being repaired.
你昨天弄坏的那把椅子现在正在修理。
The film (which/that) I saw last night was about a soldier who fought in WWII.
我昨天晚上看的那部电影是关于一个在二战中打过仗的士兵的。
(本句有两个定语从句。)
This is the bike for which I paid $ 100.
这就是我花了100美元买的那辆自行车。
The car (which/that) he went in was a black Cadillac.
他坐在里面走了的那辆汽车是一辆黑色的卡迪拉克。
The accounts of the company,(which/that) I’ve been paying great attention to,are in balance.
我一直非常注意的公司账目，是保持平衡的。
3.whose 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.
那辆所有的灯都破了的汽车是我父亲的。
例：His house of which the windows (the windows of which /whose windows) were all broken was a depressing sight.
他那所有窗户都坏了的房子真是目不忍睹。
That is the book whose cover (of which the cover/the cover of which ) was broken.
这就是那本封皮破了的书。
4.关系代词的格应与它在从句中充当的成分一致。特别要注意插入语，
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.
在选举的时候我投了我认为最合适的那个人的票。
5.关系代词作从句的主语时，从句的动词必须和先行词的人称和数一致：
例：These are the operating instructions that/which are written in English。
这就是用英文写成的使用说明。
Are you staying at the white house which/that is newly completed and which /that has 15 bedrooms,3 kitchens and 4 toilets?
你是住在那幢刚刚竣工、有15个卧室、3个病房和4个卫生间的白色房子里吗?
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