您好,現在軟糖來為大家解答以上的問題。定語從句引導詞when，定語從句引導詞相信很多小伙伴還不知道,現在讓我們一起來看看吧！
1、定語從句：在復合句中修飾名詞或代詞的句子先行詞：被定語從句所修飾的詞He is a boy who is smart. 由 關系代詞 引導 關系副詞 關系代詞：關系代詞所代替的先行詞是人或物的名詞或代詞，并在句中充當主語、賓語、定語等成分。
2、關系代詞在定語從句中作主語時，從句謂語動詞的人稱和數要和先行詞保持一致 These are students who won the first place last year. I like the book which you bought yesterday. Who Whom 先行詞為人 Whose That Which 先行詞為物 （1）Who 與 Whom 以及 Whose 的區別Who 在定語從句中做主語或賓語 Theman who is speaking at the meeting is a worker. Whom 是 Who 的賓格，所以在定語從句中充當賓語成分 Thewoman whom they wanted to visit is a teacher. Whose 在定語從句中既可以指人也可以指物，要有“的”意思 Iknow the girl whose mother is a teacher. Ihave a book whose cover is yellow. （2）Which 和 That兩張先行詞都是物，且在定語從句中充當主語或賓語，但that先行詞也可以是人，且that充當定語從句賓語成分是可省略 Thisis a truck which / that is made in China.I like the book (which / that) you bought yesterday. Theman that is speaking at the meetingis a worker.（3）只能用That的情況1. 序數詞或形容詞最高級修飾先行詞時 Tom is the cleverest boy that I have everknown. This is the first play that I have seensince I came here.2. 先行詞被every, some, no, all, any, little,much等修飾時 I’ve read all the books that you lend me. everything,something, nothing, all, anything, little, much等不定代詞作先行詞時Everything that we saw in thisfilm was true. 先行詞被the only, the very, the same, the last修飾時This is the very bookthat belongs to him. 主句已有who或which時Who is the girl that is standingunder the tree?Which is the machine that we used yesterday. 當先行詞同時指人和物時I’ve never heard of the people andthings that you talked about just now. （4）As 和 Which 的區別1. As和which都可以在定語從句中做主語或者賓語，代表前面整個句子Hemarried her, as/which was natural.2． as引導非限制性定語從句，可放在主句之前，或者主句之后，甚至可以切割一個主句；which引導的非限制性定語從句只能放在主句之后。
3、另外，as有“正如??，正像??”的意思As is known to all, China is a developing country. 關系副詞：關系副詞可代替的先行詞是時間、地點或理由的名詞，在從句中作狀語。
4、 Thisis the place where I was born. Iremember the day when I first met him. Canyou tell me the reason why you lied to me? 關系副詞 Where When why關系副詞和介詞+關系代詞（which）替換When= On(in during…) WhichWhy= forwhichWhen= On(in in front of…) WhichI stillremember the day when I first met him.I still remember the day on which I first methim.。
本文就為大家分享到這里，希望小伙伴們會喜歡。