关系副词用于引出定语从句，次要有when，where，why。它们后面的句子主干完全 ，只缺状语，它们都能够等于介词+which；也就是说关系副词和关系代词能够彼此转化，二者的抉择 次要看该关系词在从句要充任的句法成分。
关系副词的特征
关系副词用于引出定语从句，次要有when，where，why：
Sunday is the day when very few people go to work. 日曜日是没什么人上班的日子。
【注】关系副词用于引出定语从句，且在从句顶用做状语。关系副词when 表达 时间，where表达 地点，why表达 原因。
利用关系副词的重视 点
(1)how不克不及用做关系副词，不要想当然地将how用做关系副词置于the way 后表达 体例： 他说话就是阿谁样子。
误：This is the way how he spoke.
正：This is how he spoke. / This is the way (that, in which) he spoke.
(2)关系副词when和where既可引导限造性定语从句，也可引导非限造性定语从句，但why只能引导限造性定语从句，不克不及引导非限造性定语从句(若引导非限造性定语从句，可用for which reason)。
(3)引导定语从句时，when的先行词为时间，where的先行词为地点，why的先行词为原因(次要是the reason)，但是反过来却纷歧定：
Don’t forget the time (that) I’ve told you. 不要忘记我告诉你的时间。
关系副词有哪些？怎么用关系副词(when、where、why)引导的定语从句,它们后面的句子主干完全 ，只缺状语，它们都能够等于介词+ which。也就是说关系副词和关系代词能够彼此转化，二者的抉择 次要看该关系词在从句要充任的句法成分。
1、When
指时间,在定语从句中做时间状语。其先行词是表时间的名词(如:time, day, week, month, etc.)。但并不是先行词为"时间名词",就用when引导。当关系词充任定语从句的状语时,用when;当关系词充任主语或者宾语时用which或that 引导。
I still remember the day when my brother joined the army.(做状语，when能够转化为on which)
I still remember the days which/that we spent together. (做spent的宾语)
2、Where
指地点在定语从句中做地点状语。其先行词是表达 地点的名词(如:place, school, room, etc.)。同理，先行词是"地点名词"时,定语从句可用where引导,还可用which/that引导，取决于该引导词在从句中的成分。
This is the factory where he worked last year. (做状语, where能够转化为in which)
This is the park which/that they visited last year. (做visited的宾语)
3、Why
指原因在定语从句中做原因状语, 先行词凡是为reason。同理，先行词为表原因的名词时,还要根据 引导词在从句中成分决定用why仍是which/that。
The reason why he didn't come to school was that he was ill(做状语).
I don't believe the reason (that/which) he gave me. (做give的宾语)
He asked me the reason that can explain my success. (做explain的主语)
扩展材料
关系副词when,where和why能够用介词+which的形式替代。
1、when=介词+which
I will never forget the day_____ we met for the first time.
解析：先行词是the day，后面的从句恢复到完全 句为：we met for the first time on the day.因而，on the day做状语用关系副词when取代，假设 用介词+which，就改成on which。谜底为when或on which。
2、where =介词+which
This is the farm______ we worked when we were young.
解析：先行词是the farm，后面的从句恢复到完全 句为：we worked on the farm when we were young. 因而，on the farm能够用关系副词where取代，假设 用介词，就改成on which。
3、why= for which
I don't know the reason ______he did it.
解析：先行词是the reason，后面的从句恢复到完全 句为：he did it for the reason. 因而，for the reason能够用关系副词why取代，假设 用介词，就改成for which。
什么是关系副词?引导定语从句的关系副词有三个：when,where,why,都在定语从句中担任状语（重视 不克不及担任主语和宾语,那经常 是解题关键 ）
一、关系副词when的用法
when 既可引导限造性定语从句，又可引导非限造性定语从句。先行词是时间名词，在从句中充任时间状语，相当 于“介词+which”。如：
Can you tell me the time when the film will start?—Can you tell me the time at which the film will start? 请告诉我片子什么时候起头好吗？(限造性定语从句)
I will never forget the day, when I joined the Party. —I will never forget the day, on which I joined the Party. 我进 党的那一天，我永久不会忘记。(非限造性定语从句)
二、关系副词where的用法
where既可引导限造性定语从句，又可引导非限造性定语从句。先行词是地点名词，在从句中充任地点状语，相当 于：“介词+which”。如：
This is the school where I studied a few years ago. —This is the school in which I studied a few years ago. 那就是我几年前所在读书的学校
Let’s go to the concert, where you will find much fun. —Let’s go to the concert, in which you will find much fun. 我们往 音乐演唱会吧，在那里你会找到很大的乐趣。
三、关系副词why的用法
why只能引导限造性定语从句，先行词只要reason一词，在从句中充任原因状语，相当 于：“for + which”。如：
Do you know the reason why he is not here now?—Do you know the reason for which he is not here now? 你晓得他还没有来那儿的原因吗？
四、关系副词that的用法
that只能引导限造性定语从句，充任关系副词时，其感化相当 于：“介词+关系代词”，在从句中充任时间、地点、体例、原因状语等。如：
1. 在定语从句中做时间状语。现行词有：each time, every time, anytime, the first time, the moment, the minute, the hour, etc. 但现代英语中，that往往省略。如：
Each time (that) I meet him, he will smile and say “hello”. 每次我会见他时，他城市笑着说“喂，你好!”
2. 在定语从句中做体例状语, 现行词是way, 如：
Can you show me the way (that) you solve the problem like this? 请告诉我你处理那类问题的办法好吗？
3. 在定语从句中做原因状语，现行词只要reason一词，如：
I don’t know the reason (that) he has left school now. 我不晓得他停学的原因。
4. 在定语从句中做其他状语，现行词如price, speed等，如：
I think the price (that) she sells her apple is too high. (that = at which) 我认为她卖苹果的价格太高
关系代词：在句中做主语、宾语或定语
有that, which, who, whom, whose, as等,
1. that既可代表事物也可代表人,which代表事物；它们在从句中做主语或宾语,that在从句中做宾语时常可省略关系词,which在从句中做宾语也能够省略.[eg：This is the book （which）you want.]
2. 假设 which在从句中做“不及物动词+介词”的介词的宾语,重视 介词不要丢掉,并且介词老是放在关系代词which的前边,但有的则放在它本来的位置
3. 代表物时多用which,但鄙人列情状 顶用that而不消which：
a)先行词是anything, everything, nothing , none等不定代词时；
b)先行词由every, any, all, some, no, little, few, much等润色时,那时的that常被省略；
c)先行词前有序数词或被描述词更高级润色时；
d)先行词中既有人又有物时；
e)整个句中前面已有which,who,that时；
f)领先行词为物并做表语时；
g)先行词为one时；
h)先行词同时又被the only,the very,the same润色时；
4. who和whom引导的从句用来润色人,别离 做从句中的主语和宾语,whom做宾语时,要重视 它能够做动词的宾语也能够做介词的宾语
5. whose是关系代词,润色名词做定语,相当 于所润色成分的前置所有格.它引导的从句能够润色人和物, 当它引导的从句润色物体时, 能够与 of which 互换,表达的意思一样.
区分关系副词和关系代词根本办法如下：
先把主句和定语从句分隔,再找出定语从句所润色的名词/代词（即先行词）,然后放进 定语从句中,看看那两者的搭配情状 .
1）假设 定语从句和该先行词能够间接相连,且在从句中充任主语/宾语/表语的话,则用关系代词.
因为关系代词也属于代词,而代词功用同名词,在句子中一般充任语/宾语/表语.
如：This is the city (which/that) you visited last year.
定语从句所润色的先行词是the city,放进 定语从句you visited last year中,则它间接充任visited的宾语,酿成：you visited the city last year.
2）假设 定语从句和该先行词无法间接相连,必需别的多加上介词,并在定语从句中充任状语时,则利用关系副词.
如：This is the city where you stayed last year.
定语从句所润色的先行词也是the city,将其放进 定语从句中不克不及间接做成分,必需加上介词in,一路做从句的地点状语,即定语从句变成：you stayed in the city last year.
