that是个常见词,用法广泛，可用作形容词、代词、连词、副词，还可用于固定搭配。可以引导不同种类的从句，下面就是海天考研给各位考生梳理的that的形式结构。一起来看看吧!

　　一、that引导名词性从句

　　所谓名词性从句,指的是主语从句、宾语从句、表语从句和同位语从句.that引导名词性从句时,它本身不作任何句子成分,也没有任何词义,只起连接作用.

　　1. that引导主语从句

　　可以将that引导的主语从句放在谓语动词前面,也可在句首用形式主语it,而将that引导的主语从句后置.例如：

　　(1)That Mr King had been put into a women”s ward surprised his boss .

　　= It surprised his boss that Mr King had been put into the women”s ward .

　　金先生被安排在了女病房使他的老板很吃惊.

　　(2)That Professor Wang will give us a lecture tomorrow afternoon is known to all .

　　= It is known to all that Professor Wang will give us a lecture tomorrow afternoon .

　　大家都知道,王教授明天下午要给我们讲课.

　　注意：that常在下边的句型中引导主语从句：It is / was + 动词的过去分词 + that从句.例如：

　　(3)It is said that the book has been translated into several foreign languages .

　　据说,那本书已被译成了几种外语.

　　(4)It is reported that as many as 250,000 people lost their homes because of the earthquake .

　　据报道,多达25万人因地震而无家可归.

　　2. that引导宾语从句

　　引导宾语从句的that,在口语和非正式语体中常可省略.如果句中有两个或两个以上的宾语从句,则除第一个that可省略外,其它宾语从句中的that都不能省略.例如：

　　(1)He suggested (that) we should keep on trying .

　　他建议我们继续努力.

　　(2)We must believe (that) each one of us is able to do something well , and that , when we discovered what this is , we must work hard at it until we succeed .

　　我们必须相信,我们每个人都能把每件事做好;而且我们领悟此事是何事之后,我们就必须努力做下去,直到成功为止.

　　3. that 引导表语从句

　　that引导的表语从句,一般位于句尾,that通常不能省略.例如：

　　(1)It seems that it is more difficult for women to get jobs than men .

　　似乎女人找工作比男人更难.

　　(2)The reason why so many people were killed in the big fire is that the building was built without any fire escapes .

　　这么多的人在大火中丧生,其原因是那座楼房里没有太平门.

　　4. that引导同位语从句

　　同位语从句是对前面名词的具体内容所作的详细阐述.例如：

　　(1)We are surprised at the fact that the children did it on their own .

　　听说孩子们独立做那件事,我们感到吃惊.

　　(2)They expressed their hope that they would like to go to visit the Great Wall .

　　他们表达了他们想去参观长城的愿望.

　　二、that引导定语从句

　　that引导定语从句时,是关系代词,它可指人(相当于who , whom ),也可指物(相当于which).that在定语从句中可作主语,也可作宾语(作宾语时常可省略).当定语从句修饰的先行词既有人又有物时,只能用that引导定语从句.例如：

　　1. This is the museum (that / which) they visited last month .

　　这就是他们上个月参观的博物馆.

　　2. They are going to the village that / which lies south of the mountain .

　　他们将去山南边的那个村庄.

　　3. The man (that / who / whom) I shook hands with just now is one of my old classmates .

　　刚才和我握手的人是我过去的一位同班同学.

　　4. Do you still remember the things and persons that we talked about at the meeting last month ?

　　你还记得上月我们在会上谈到的人和事吗?

　　三、that用在强调句型中

　　强调句型的结构为：It is / was … that … .如果被强调的是人,可用who代替that.如果被强调的是时间状语、地点状语或原因状语,则一般都用that.例如：

　　1. It was on July 30 that they decided to meet again .

　　就是在六月三十日他们才决定再一次见面的.