定语从句中关系词必须用that的情况：
1. 被修饰的先行词是不定代词all，much，something，everything，nothing，none，the one等时，（注意：表示人的不定代词即可用that也可用who/whom）
如：Anyone who/that doesn’t like this film must tell me.
Do you have something that is very difficult to understand?
All（that）I can do is to give him some hope.
2. 被修饰的先行词还有一些特定意义的修饰词，如：the only、the very、just the、the right、any、every、no、all、much、many、little、few等，
如：The only thing（that）we know is that the universe is very big.
Any bus that can go there is OK.
This is just the/the very/the right book I am looking for.
There are few cars that are driving slowly.
Every car that has a high price is worth what it costs.
3．句子中出现过which或who之类的词，为了避免重复，要用that，
如：Who is the man that is speaking?
The factory which produces shoes that are very good has gone bankru
4．关系代词在从句中作表语时，多用that。如：
She is not the girl that she was three years ago．
5．先行词被形容词最高级、only等修饰时，应用that。如：
Tang Guoqiang has become one of the best actors that appear on Chinese screens．
6. 先行词既有人又有物或time，
如：Can you tell me the people and events（that）you saw in Britain?
The man and his dog that looked odd came to me quietly.
Each time that he came here, he would like to talk with her. 5．关系代词与the same（指同一人）连用时，只能用that。如：
This is the same person that I met yesterday．
7．一个句子中有两个定语从句时，如第一个从句中已用who，第二个从句中宜用that。如：
The man who is at table is his brother that has been serving in the army．
8．当先行词是to be的表语，或关系代词本身是从句的表语时，关系代词应用that。如：
1）It's a song that is very popular．
2）My hometown is no longer the place that it used to be．
5．当主句以There be开头时，关系代词应用that。如：
There is a seat in the corner that is still free．
9．当一个句子中含有两个定语从句时，如前一个已用关系代词which，后一个关系代词宜用that。如：I'll borrow a book which tells about the heroic deeds that the PLA did in the battles against the invaders．
但两个定语从句的结构如果平行，一个定语从句中用关系代词that，另一个定语从句也应重复that。如：He told me to read a book that is very short，and that is very interesting．
10．与the same（指同一物）连用，构成the same．．．that．．．结构时，关系代词只能用that。如：
This is the same museum that you once visited．
注意：the same．．．that．．．结构中的that不能用as代替，因为the same．．．as．．．与the same．．．that．．．的含义不同。
.在there + be 的句型中，句子的主语是先行词，而且又是物。例如： There are two novels that I want to read. 我要读的有两本小说。 There is no work that can be done now. 没有什么工作现在能做的了。 2.当先行词为主句的表语或者关系代词为从句的表语时。例如： This is the book that was bought yesterday.这就是昨天买的书。 Our school is no longer the school that it used to be. 我们的学校不再是以前的学校了。 3.以Here is (are)开头的句子时。例如： Here is a film that will move anyone.这是一部将使任何人受感动的电影。Here are two books that I will buy.这是我要买的两本书。 4.It is (high)time +定语从句中。例如： It is time that we should have a rest.我们应该休息了。 It is high time that they started out. 他们该动身了。 5.当先行词是way等词时，关系代词用that或者in which在定语从句中作方式状语时，在口语中，常可省略。例如： This is the way that my father did this work.这就是我父亲做此工作的方式。 She admired the way in which I answered the questions. 她羡慕我回答问题的方式。 6.在双重限定性定语从句中，如果一个从句用who或者which引导时，那么另一个从句用that引导。例如： He is the student that I have ever see who can jump highest.他是我曾经看到过跳得最高的学生。 My brother studies in the school which is the most beautiful in our city that isn’t far from here. 我的弟弟在我们的城市最美丽的学校读书，并且离这儿不远。 7.当先行词被the last , the very 和the only修饰时。例如： This is the very pen that I am looking for. 这正是我找的钢笔。 The only book I want to read is missing. 我唯一想看的书不见了。 8.在强调句子中，并且以who ,which, what开头时。例如： Who was it that was lost ? 究竟是谁迷路了？（此句中，最好不用who来代替that，避免重复。） What was it that you did last week? 你上周究竟做什么了？ 9.当先行词有序数词时。例如： You are the first person that I want to ask for.你是我要见的第一个人。This is the second book that I have ever written.这是我写的第二本书。 10.当先行词被all, every, no , some, few , little, much, both等修饰时，例如： This is all that I want to say at the meeting.这就是我在会上要说的。Have you any books that are worth reading? 你有值的看的书吗？ 11.当先行词既指人又指物时。例如： The professor and his achievement that I heard about are admired by them .
定语从句中which和that用法 在定语从句中，which 和that 在指代事物时，一般可以互换使用，但并非在任何情况下都是这样。 一、宜用that, 而不宜用which 的情况. ①先行词为不定代词all,much,something,everything,anything,nothing,none,the one 等 1. We should do all that is useful to the people. 2. There's nothing that can be said about it. 3. Do you mean the one that was bought yesterday ②先行词被only, any, few, little, no, just, very, one of等词修饰时。 1 .The only thing that we could do was to wait. 2 .That's the very word that is wrongly used. 3 .The last place (that) we visited was the chemical works. 4 .You can take any (=whichever) seat that is free. 5 .I hope the little that I can will be of some help to them. ③先行词是序数词时或被序数词修饰时。 1. When we talk about Wuxi, the first that comes into mind is Tai Lake. 2. This is the third film that has been shown in our school this term. ④先行词是最高级或被最高级修饰时。 1. This is the best that can be done now. 2. The most important thing that should be done right now is how to stop him from going on. ⑤先行词既有人又有物，用which和who都不适合，这时宜用that. 如： writer and his novel that you have just talked about is really well known . rider and his bike that had run over an old woman were held up by the police. ⑥被修饰词为数词时. 1. Yesterday I caught two fish and put them in a basin of water .Now you can see the two that are still alive .
定语从句中关系词省略的6种情形 欧阳光明（2021.03.07） 关系词有时可以省略，但这只限于限制性定语从句中，在非限制性定语从句中，关系词则不可省略。 一、关系代词作宾语时的省略 当关系代词who, whom, which和that在定语从句中用作动词宾语或介词位于句末时的介词宾语时，可以省略。如： Is there anything (which) you wanted? 想要什么东西吗? Who is the man (that / who / whom) you were talking to? 刚才和你讲话的人是谁? 二、关系代词作表语时的省略 当关系代词that在定语从句中用作表语时，可以省略。如： China is not the country (that) it was. 中国已不是过去的中国了。(that作表语) 三、关系代词作宾补时的省略 当关系代词that在定语从句中用作宾语补足时，可以省略。如： I’m not the madman (that) you thought me. 我并不是你所认为的那个疯子。(that作宾语补语) 四、关系副词when的省略 用作时间状语的关系副词when通常不能省略，但有一种特殊情况，即用于day, year, time等少数几个词后时可以省略(也可换成
that)。如： That was the year (that) I first went abroad. 就是那一年我第一次出国了。 I’ll never forget the day (that) we met. 我永远也忘不了我们见面的那一天。 五、关系副词where的省略 用作地点状语的关系副词where通常不能省略，但有一种特殊情况，即用于place, somewhere, anywhere, everywhere, nowhere少数几个词后时可以省略(也可换成that)。如： This is the place (where) they met yesterday. 这就是他们昨天碰头的地方。 Have you somewhere (that) I can lie down for an hour? 你有没有一个什么地方可以让我躺一个小时？ 六、关系副词why的省略 关系副词why通常只用于the reason后引导定语从句，且通常可换成that或for which，均可省略。如： That’s the reason (why, for which, that) he came. 这就是他来的原因。 Give me one reason (why) we should help you. 给我举出一个我们应当帮助你的理由
定语从句中的that和which的用法 引导定语从句的关系代词有：that（指人或物）,which （指物）,who (指人）.指人时可用that或who ；指物时可用that 或which 。 That和which在从句里都可以做宾语和主语，做宾语时可以省略。指物时，两者一般可以互换，但在下列情况下只能用that： 1）当先行词是all ,any ,anything ,everything ,nothing 或被它们修饰时.例如： Is there anything that I can do for you 有什么可以为你做的吗? All that can be done must be done . 凡是能做的都必须做. 2）当先行词被形容词的最高级或序数词修饰时.例如：That is one of the most interesting books that are sold in the bookshop . 那是这家书店出售的最有趣的书之一. The first thing that we should do is to get some food . 我们该做的第一件事是弄点吃的. 3）当先行词有：the only ,the very ,the same ,the last 等修饰时.例如：
My necklace is not the only thing that's missing . 我的项链不仅是丢掉的东西. 4）当主句以who或which开头时,定语从句中引导词用that ,不用which 或who .以避免重复.例如： Who is the girl that is wearing a red coat 正穿一件红色外套的女孩子是谁? 5）当先行词既有人又有物时,用that .例如： The writer and his novel that you have just talked about are really well known . 你刚才谈起的那位作家以及他的小说确实很著名. 请注意: 以下几种只能使用which的情况: 1.引导非限制性定语从句，用which。 2.在“介词＋关系代词”结构中，关系代词必须用which。 如：The house in which we live is very large. 我们住的房子非常大。 This is the reference book of which the teacher is speaking. 这就是老师正在谈及的那本参考书。 注意：如果介词不放在修饰事物的限定性定语从句的句首，which就可换为that，例如：This is the question which/that we've had so much discussion about. =This is the question about which we've had so much discussion.
定语从句中关系词省略的6种情形 关系词有时可以省略，但这只限于限制性定语从句中，在非限制性定语从句中，关系词则不可省略。 一、关系代词作宾语时的省略 当关系代词who, whom, which和that在定语从句中用作动词宾语或介词位于句末时的介词宾语时，可以省略。如： Is there anything (which) you wanted 想要什么东西吗 Who is the man (that / who / whom) you were talking to 刚才和你讲话的人是谁 二、关系代词作表语时的省略 当关系代词that在定语从句中用作表语时，可以省略。如： China is not the country (that) it was. 中国已不是过去的中国了。(that作表语) 三、关系代词作宾补时的省略 当关系代词that在定语从句中用作宾语补足时，可以省略。如： I’m not the madman (that) you thought me. 我并不是你所认为的那个疯子。(that作宾语补语) 四、关系副词when的省略 用作时间状语的关系副词when通常不能省略，但有一种特殊情况，即用于day, year, time等少数几个词后时可以省略(也可换成that)。如： That was the year (that) I first went abroad. 就是那一年我第一次出国了。 I’ll never forget the day (that) we met. 我永远也忘不了我们见面的那一天。 五、关系副词where的省略 用作地点状语的关系副词where通常不能省略，但有一种特殊情况，即用于place, somewhere, anywhere, everywhere, nowhere少数几个词后时可以省略(也可换成that)。如： This is the place (where) they met yesterday. 这就是他们昨天碰头的地方。 Have you somewhere (that) I can lie down for an hour 你有没有一个什么地方可以让我躺一个小时 六、关系副词why的省略 关系副词why通常只用于the reason后引导定语从句，且通常可换成that 或for which，均可省略。如： That’s the reason (why, for which, that) he came. 这就是他来的原因。 Give me one reason (why) we should help you. 给我举出一个我们应当帮助你的理由
英语语法：定语从句中的that和which 英语语法：定语从句中的that和which That which代表物，区别听我来叙述; 先行若是不定代，that就把which 踹; 当先行词为anything，everything，nothing，all，any，much，many，one等不定代词时，只能使用“that”,不用“which”。 例：Is there anything that I can do for you? 我能给你做点什么吗? 先行词前有两数，就用that定无误; 当先行词是基数词或序数词修饰时，只能使用“that”，不用“which”。 例句： That is the second time that I have been to Japan. 那是我去日本的第二次。 The two buildings that lay on the River Thames fell down last week. 坐落在泰晤士河岸边的那两座大楼上星期倒塌了。 先行词前最高级，还用that必无疑; 当先行词是形容词最高级或被形容词最高级修饰时，只能使用“that”,不用“which”。 例句：This is the most wonderful time that I have ever had. 这是我度过的最美好的时光。 句中若有there be, that应把which替; 例：There is no evidence that animals possess a mysterious sixth-sense allowing them to pre dict natural disasters. 说动物拥有神秘的第六感，可以预知自然灾害，这是没有根据的。 先行主中做表语，避免重复从句里; 例句：1)This is not the hospital that it used to be.
THAT什么时候可以省略? 标签：省略is语法 回答：2 浏览：3247 提问时间：2007-06-02 12:29 The reason for that is that ................. 如果语法没错的话,那么THAT可以去掉么? 推荐资料:化学版青花瓷.mp3 更多"青花瓷"相关资料>> 最佳答案此答案由提问者自己选择，并不代表爱问知识人的观点 揪错┆评论 有来无回 [文曲星] 宾语从句中that一般情况可省,但也并不是任何情况下都可以省略。 具体如下： 宾语从句 1．定义：用作宾语的从句叫宾语从句。 2．构成：关联词+简单句 从属连词that。如： He told us that he felt ill. 他对我们说他感到不舒服。 I know he has returned. 我知道他已经回来了。(that省略) 注:宾语从句中that一般情况可省,但that在引导宾语从句时也并不是任何情况下都可以省略。在以下情况下，that不能省略。 1．Everybody could see what happened and that Tom was frightened.(and连接两个宾语从句，that宾语从句放在and的后面时，that不能省略。) 大家都会看出所发生的事情并知道Tom非常害怕。 2．I know nothing about him except that he is from the south.(that引导的宾语从句作介词宾语时，that 不能省略。)
对他我一无所知，只知道他是南方人。 3．That he ever said such a thing I simply don’t believe. (that从句位于句首时，that不可省略。) 我简直不相信他曾说过这样的话。 4．We decided, in view of his special circumstances, that we would admit him for a probationary perio d. (主句谓语动词与that从句之间有插入语，that不可省略。) []打印 关系词有时可以省略，但这只限于限制性定语从句中，在非限制性定语从
定语从句中的that和which的区别： that和which在从句里都可以做宾语和主语，做宾语时可以省略。在定语从句中,有种说法叫"关宾省",意思是关系代词在限制性定语从句中作宾语可以省略,不管是that，which，还是whom。但是which能引导非限制性定语从句，that则不行。 只能用that的几种情况： 1. 当先行词为all, much, little, none及由any, every, some, no所构成的复合不定代词时。We should do all that is useful to the people. Please tell me anything that you know about the matter. 2. 当先行词被any, few, little, no, all, much, some等词修饰时。 You can take any seat that is free. There is little work that is fit for you. 3. 当先行词为序数词或被序数词所修饰时。 When people talk about the cities of China, the first that comes to my mind is Beijing. This is the fourth film that has been shown in our school this term. 4. 当先行词为形容词最高级或被形容词最高级修饰时。 The best that I could do was to apologize. This is the most interesting story book that I have ever read. 5. 当先行词被the very, the only, the last, the just, the same等修饰时。 This is the very book that I’m looking for. The only thing that we could do was to wait. 注意：先行词被the same修饰时，关系代词也可用as。 I need the same book that / as you have. 6. 当先行词既包含人又包含物时。 They are talking of the heroines and their deeds that interest them. 7. 当先行词是疑问代词who，which，what或主句以这些词开头时。 Who that has ever worked together with him doesn’t admire him? Which is the star that is nearer to the earth？ 8. 当先行词为主句表语或关系代词为从句表语时。 That’s a good book that will help you a lot. Our school is no longer the place that it used to be. 9. 先行词为time时，当time表示次数，引导词用that, 可省略。当表示时间，可用that 或when引导，都可省略。 I do remember the first time(that) I had ever heard the sweetest voice in the world. I did't remember the exact time （when/that）I arrived in Shanghai last month. 只能使用which的情况: 1. 在“介词＋关系代词”结构中，关系代词必须用which。 The house in which we live is very large. This is the reference book（参考书）of which the teacher is speaking. 注意：如果介词不放在修饰事物的限定性定语从句的句首，which就可换为that。 This is the question which/that we’ve had so much discussion about. =This is the question about which we’ve had so much discussion. 2. 先行词为“those＋表事物的复数名词”时，关系代词通常只用which而不用that。 You should grasp well those skills which may be used in the future work.
定从中只用That不用which的情况 1.在there + be 的句型中，句子的主语是先行词，而且又是物。例如：There are two novels that I want to read.我要读的有两本小说。There is no work that can be done now. 没有什么工作现在能做的了。 2.先行词是最高级或被最高级修饰时 3.以Here is (are)开头的句子时。例如： Here is a film that will move anyone.这是一部将使任何人受感动的电影。 Here are two books that I will buy.这是我要买的两本书。 4.It is (high)time +定语从句中。例如： It is time that we should have a rest.我们应该休息了。 It is high time that they started out. 他们该动身了。 5.当先行词是way等词时，关系代词用that或者in which在定语从句中作方式状语时，在口语中，常可省略。例如： This is the way that my father did this work.这就是我父亲做此工作 的方式。 She admired the way in which I answered the questions.她羡慕我 回答问题的方式。 6.在双重限定性定语从句中，如果一个从句用who或者which引导时，那么另一个从句用that引导。例如： He is the student that I have ever see who can jump highest.他是我曾
that和which引导的定语从句：微习题 用which 或that填空： 1. You should hand in all _________you have. 2.Please send us all the information ________you have about the candidate for the position. 3. What is the first American film _______you have seen? 4.The first place________ they visited in London was the Big Ben. 5. This is the best________ has been used against pollution. 6.This is the most exciting film _______I ever seen. 7. They talked about the persons and things ______ they remembered at school. 8. Which is the T-shirt _______ fits me most? 9. That is the very book _____he is looking for. 10.He is the only man _______ can do the work. 11. Tom was late for work again this morning，_______ made the boss angry. 12. Football, ________is a very interesting game, is played all over the world. 13. This is the place in _______ Lu Xun used to live. 14. The chair on ______ she sat is made of wood. 15. He lived in a big house, in front of _______ stood a big tall tree. 答案： 1. that 2. that 3. that 4.that 5. that 6. that 7. that 8. that 9. that 10. that 11. which 12. which 13. which 14. which 15. which
只能用that 的情况： 1. 先行词为不定代词all, much, everything, nothing, none, the one 2. 先行词被only, any, few, little, no ,just, very, one of 修饰 3. 先行词被序数词或就是序数词时 4. 先行词是最高级 5. 先行词既是人又是物 6. 先行词是次数时two, ten, a hundred 7. 两从句一个已用which ，另一个用that,避免重复 8. 疑问词是who/which,宜用that 9. 主句there be 10. 被修饰部分为表语or 关系代词本身是定从的表语时：主+be+n./adj. ; 主+系+adj. 只能用which 的情况： 1. 介词后 2. 非限制性定从 3. 当关系词后带插入语时 只能用who 的情况: 1. 先行词为anyone, anybody, those, all, one, ones, they, he, people 2. 非限制性定从 3. There be 先行词为way 时，定从常用that, in which, how, that. that 可省 As 的用法： 正如……As 是关系代词，代替整个句子，在后面的句子中充当动词know 的宾语。 He was a foreigner, as I know from his accent. 如为限制定从，多用于the same…as, such…as…, as many/much as, so as I have the same book as you (have). Her attitude to him was quite the same as it had always been. I live in the same house that he used to live in. I’m wearing the same shirt as you were yesterday. 非限制定从中，as 常至于句首。 As we all know, smoking is harmful to one’s health. as 做主语 as is well known (to us) as was mentioned before as could be expected as could be judged from her eyes as may be seen from the book as is recounted in his stories
定语从句中 which,that 的用法与区别 只能使用that的情况： 1.当先行词是nothing, something, anything, all, each等不定代词时。 e.g. Do you have anything that is important to tell me? 2.当先行词被all, any, some, no, not, every, each等修饰时。 e.g. I have some books that are very good. 3.当先行词被形容词最高级、序数词(包括last, next等)所修饰时。 e.g. This is the first book that I bought mysel f. The biggest bird that I caught is this bird. 4.主句是以which或who开头的特殊疑问句时 e.g. Which is the bike that you lost? 为了避免重复时用that Who is the woman that was praised at the meeting. 5.当先行词在从句和主句中都作表语时,无论先行词是人还是物. China is no longer the country that she was. 6.如有两个定语从句,其中一个已用which引导,另一个宜用that . Edison built up a factory which produced things that had never been seen before. 7.在there be句型中,只用that. He asked for the latest book (that) there is on the subject. 8.当先行词被the very, the last, the next, the only，the same 等词修饰时。 e.g. This is the very book that I lost yesterday. 9.当先行词又有人又有物时。 e.g. I won’t forget the things and the persons that I saw. 10. 先行词被all, every, no, any, little, some, much等修饰时。 I’ve read all the books that are not mine. 只能使用which的情况。 1、非限制性定语从句(即通常用逗号与主句隔开，如果去掉逗号，整个句子仍能表达完整的意义的定语从句)中。 e.g. Mary has a book, which is very precious. 2、在介词之后。 e.g. This is a house in which lives an old man. 3、当主句中的主语被that修饰时。 e.g. That dog which I found in the street belongs to Mary. 4. 非限定性定语从句修饰的是前面的整个句子，而且关系代词和关系副词前面有逗号, 用which开始的定语从句修饰前面半句 e.g. He will wear no clothes, which will distinguish（区分，辨别）him from his fellow men.
定语从句中which和that区别 奥赛书上的内容： 介词后只能用which不能用that 先行词为 xxx-thing 时只能用that 先行词被the only（含序数词）等限定词修饰时只能用that 先行词被最高级修饰时只用that 限制性定语从句只能用that 的几种情况 1．当先行词是anything, everything, nothing (something 除外), few, all, none, little, some 等代词时，或者是由every, any, all, some, no, little, few, much 等修饰时 (1) Have you taken down everything that Mr. Li has said? (2) There seems to be nothing that seems impossible for him in the world. (3) All that can be done has been done. (4) There is little that I can do for you. 注意：当先行词指人时，偶尔也可以用who (4) Any man that/.who has a sense of duty won't do such a thing. 2. 当先行词被序数词修饰 (1) The first place that they visited in London was the Big Ben. 3. 当先行词被形容词最高级修饰时 (1) This is the best film that I have seen. 4. 当形容词被the very, the only修饰时 (1) This is the very dictionary that I want to buy, (2) After the fire in his house, the old car is the only thing that he owned. 当先行词指人时，偶尔也可以用who (3) Wang Hua is the only person in our school who will attend the
定语从句中可以省略关系词的几种情况关系代词作宾语时的省略 当关系代词who, whom, which和that在定语从句中用作动词宾语或介词位于句末时的介词宾语时，可以省略。如： Is there anything (which) you wanted 想要什么东西吗 Who is the man (that / who / whom) you were talking to 刚才和你讲话的人是谁 关系代词作表语时的省略 当关系代词that在定语从句中用作表语时，可以省略。如： China is not the country (that) it was. 中国已不是过去的中国了。(that作表语) 关系副词when的省略 用作时间状语的关系副词when通常不能省略，但有一种特殊情况，即用于day, year, time 等少数几个词后时可以省略(也可换成that)。如： That was the year (that) I first went abroad. 就是那一年我第一次出国了。 I’ll never forget the day (that) we met. 我永远也忘不了我们见面的那一天。 关系副词where的省略 用作地点状语的关系副词where通常不能省略，但有一种特殊情况，即用于place, somewhere, anywhere, everywhere, nowhere少数几个词后时可以省略(也可换成that)。如： This is the place (where) they met yesterday. 这就是他们昨天碰头的地方。 Have you somewhere (that) I can lie down for an hour 你有没有一个什么地方可以让我躺一个小时
定语从句中that和which的用法及区别。。。 满意答案 楓κiζsヤ瑟5级 2009-02-16 1、定语从句中宜用that而不用which的情况 1) 先行词为all much little everything anything nothing none few the one 等不定代词； e.g. I mean the one that was bought yesterday. 2) 先行词被形容词最高级或被only any few little no all one of等 修饰时； e.g. It’s the most important task that should be finished soon. 3) 先行词为数词或被序数词（包括last）所修饰时； e.g. Look at these flowers. You can see the two that you gave me. 4) 先行词中既有人又有物时； e.g. We were deeply impressed by the teachers and schools that we had visited. 5) 主语中已有who和which的； 6) 先行词在主句中做表语或关系代词在从句中做表语时； e.g. It’s book that will help you a lot. My hometown is no long the plac e that it used to be. 2、不宜用that的情况 1) 关系代词前有介词时； e.g. This is the room in which Lu Xun lived. 2) 非限定性定语从句中； e.g. He has a daughter, who works in a hospital. 3) 先行词本身是that时； e.g. The clock is that which tells the time. 评论(0)40 满意答案 晴天9级 2009-02-15 一定语从句的关系代词 Which的用法: 若先行词指物则代替先行词在 定语从句中充当主语或宾语. This is the pen which was given by my friend.
定语从句中可以省略关系词的几种情况 关系代词作宾语时的省略 当关系代词who, whom, which和that在定语从句中用作动词宾语或介词位于句末时的介词宾语时，可以省略。如： Is there anything (which) you wanted 想要什么东西吗 Who is the man (that / who / whom) you were talking to 刚才和你讲话的人是谁 关系代词作表语时的省略 当关系代词that在定语从句中用作表语时，可以省略。如： China is not the country (that) it was. 中国已不是过去的中国了。(that作表语) 关系副词when的省略 用作时间状语的关系副词when通常不能省略，但有一种特殊情况，即用于day, year, time等少数几个词后时可以省略(也可换成that)。如： That was the year (that) I first went abroad. 就是那一年我第一次出国了。 I’ll never forget the day (that) we met. 我永远也忘不了我们见面的那一天。 关系副词where的省略 用作地点状语的关系副词where通常不能省略，但有一种特殊情况，即用于place, somewhere,
anywhere, everywhere, nowhere少数几个词后时可以省略(也可换成that)。如： This is the place (where) they met yesterday. 这就是他们昨天碰头的地方。 Have you somewhere (that) I can lie down for an hour 你有没有一个什么地方可以让我躺一个小时 关系副词why的省略 关系副词why通常只用于the reason后引导定语从句，且通常可换成that或for which，均可省略。如： That’s the reason (why, for which, that) he came. 这就是他来的原因。