that he had stolen the documents在该句中的成分？
that在英语句子中可充当什么成分
可做主语、宾语、表语、同位语
that在句中是什么成分？
一、定语从句对前面的名词具有修饰、限制或描述功能；同位语从句对前面的名词具有补充、解释、说明功能.如：
The fact that she told us is believable.她对我们说的话是可信的.(that引导定语从句)
The fact that he once joined the army is believable.他曾当过兵这一事实是可信的.(that引导同位语从句)
二、that在引导定语从句时,不光要起连接作用,还要在从句中作成分,若that在从句中作宾语,则that可以省略；而that引导同位语从句时,只起连接作用,不充当从句中的任何成分,且一般不能省略.如：
Don’t you fet the promise (that) you made?难道你忘了你许下的诺言吗?(that在定语从句中作宾语,可省略
)He makes a promise that he will make you very rich if you work with him.他许下诺言：如果你和他一起干,他会使你很富有.(that在同位语从句中不作任何成分,且不省略)
三、定语从句前面的名词既可以是具体名词,也可以是抽象名词；而同位语从句所修饰词一般是少数抽象名词,从句说明该名词所指的具体内容,如：advice,answer,belief,doubt,fact,hope,idea,information,message,news,order,promise,proposal,possibility,story,suggestion,thought,truth,view,word等.
The patient accepted the advice that the doctor gave him.病人接受了医生给他的建议.(定语从句限定advice)
The patient accepted the advice that smoking should be given up.病人接受戒烟这一忠告.(同位语从句所表述的是advice的具体内容)
This is the book that I bought yesterday.这是我昨天买的那本书.(先行词为具体名词)
关系代词或关系副词在从句中可以充当那些成分？
关系代词
一、弄清关系代词所指及其在定语从句中所充当的句子成分.
1．先行词指物时,用关系代词that／which在从句中作主语或宾语.如：
He bought a coat that／which cost little．
他买了一件便宜上衣.（作主语）
The car which ／ that he bought yesterday is a secondhand one．
他昨天买的车是个二手货.（作宾语）
2．先行词指人时,用关系代词that／who在从句中作主语或宾语（在口语中,代替whom）.如：
The man who ／ that gave a speech on TV is the president．
昨天在电视上演讲的人是总统.（作主语）
This is the strange man that／who／whom I met yesterday．
这就是我昨天碰到的那个怪人.（作宾语）
3． whose在从句中作定语,既可指人,作“某（些）人的”解；也可指物,作“某（些）物的”解.如：
This is the little girl whose parents were killed in the great earthquake．
这就是在那次大地震中失去双亲的那个小姑娘.
We live in a house whose windows open to the south．
我们居住在一所窗户朝南的房子里.
理清上述关系还能帮助我们判断定语从句谓语动词的单复数.又如：
He is one of the students who work hard．
他是学习努力的学生之一.（who指先行词the students）
He is the only one of the students who goes abroad．他是学生中唯一出国的.（who指先行词the only one）
二、记清多用关系代词that的几种情况.
1． 先行词为all,everything,nothing,something,anything,little,few,much等不定代词时.如：
There is little that I can use．
几乎没有什么我能用的了.
2． 先行词被all,each,few,much,every,no,some,any等不定代词修饰时.如：
All the books that you need are here．
你所需要的书都在这儿.
3． 先行词被序数词或形容词最高级修饰时.如：
This is the first composition that he has written in English．
这是他用英语写的第一篇作文.
4． 先行词既有人又有物时.如：
He talked about the teachers and schools that he had visited．
他谈到了他曾拜访过的老师和学校.
5． 主句是以who或which开头的疑问句时.如：
Who is the man that is speaking over there?
在那里说话的人是谁?
6． 先行词被the only,the very,the last等修饰时.如：
This is the very gun that I am looking for．
这正是我在找的枪.
7． 关系代词在从句中作表语时.如：
He is not the young man that he was thirty years ago．
他已不是三十年前的那个年轻人了.关系代词
一、弄清关系代词所指及其在定语从句中所充当的句子成分.
1．先行词指物时,用关系代词that／which在从句中作主语或宾语.如：
He bought a coat that／which cost little．
他买了一件便宜上衣.（作主语）
The car which ／ that he bought yesterday is a secondhand one．
他昨天买的车是个二手货.（作宾语）
2．先行词指人时,用关系代词that／who在从句中作主语或宾语（在口语中,代替whom）.如：
The man who ／ that gave a speech on TV is the president．
昨天在电视上演讲的人是总统.（作主语）
This is the strange man that／who／whom I met yesterday．
这就是我昨天碰到的那个怪人.（作宾语）
3． whose在从句中作定语,既可指人,作“某（些）人的”解；也可指物,作“某（些）物的”解.如：
This is the littl
初三英语：宾语从句中引导词的用法
在复合句中作主句的宾语，引导词有：
连词：that (that 常可省略),whether, if
代词：who, whose, what ,which
副词：when ,where, how, why 等。
（一）that引导的宾语从句（在非正式场合that可以省略）
可跟that从句做宾语的动词有：
say, think, insist, wish, hope, demand, imagine, wonder, know, suppose, see, believe, agree, admit, deny, expect, explain, order, command, feel, dream, suggest, hear, mean, notice, prefer, request, require, propose, declare, report等。
例句：The boy believes that he will travel through space to other planets.
注意事项：当主句谓语动词是 think, believe, suppose, expect 等词，而宾语从句的意思是否定时，常把否定转移至主句表示。
例句：I don’t think it is right for him to treat you like that.
在以下情况中that不能省略
1.当句中的动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省。
例句：He said (that) you were too young to understand the matter and that he was asked not to tell you.
2.当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省。
例句：Just then I noticed, for the first time, that our master was wearing his fine green coat and his black silk cap.
3.当that从句是双宾语中的直接宾语时，that不可省。
例句：I can’t tell him that his mother died.
注意事项：许多带复合宾语的句子，that引导的宾语从句经常移到句子后部，而用it作形式宾语。
例句：I find it necessary that we should do the homework on time.
（二）由whether,if 引导的宾语从句
由whether(if)引导的宾语从句，实际上是一般疑问句演变而来的。意思是“是否”。宾语从句要用陈述句语序。一般说来，在宾语从句中whether与if可以互换使用，但在特殊情况下if与whether是不能互换的。
例句：I wonder whether(if) they will come to our party.
只能用whether，不能用if引导的宾语从句
1.在带to的不定式前
例句：We decided whether to walk there.
2.在介词的后面
例句：I’m thinking of whether we should go to see the film.
3.在动词后面的宾语从句时
例句：We discussed whether we had a sports meeting next week
4.直接与or not连用时
例句：I can’t say whether or not thet can come on time.
只能用if不能用whether引导的宾语从句
1.if引导条件状语从句，意为“如果”
例句：The students will go on a picnic if it is sunny.
2.if引导否定概念的宾语从句时
例句：He asked if I didn’t come to school yesterday.
3.引导状语从句even if（即使）和as if（好象）时
例句：He talks as if he has known all about it.
（三）连接代词和连接副词引导的宾语从句
这样的宾语从句实际上是由特殊疑问句变化而来的，宾语从句要用陈述句语序。用于这种结构的动词常常是：see, say, tell, ask, answer, know, decide, show, find out, imagine, suggest, doubt, wonder, discover, understand, inform, advise等。
英语中的连接代词有：who,whom,whose,which,what,在句中担任主语、宾语、定语或者表语。
例句：Can you tell me whom you are waiting for?
英语中的连接副词有：when,where,why,how，在句中担任状语的成分。
例句：None of us knows where these new parts can be bought.