要學定語從句，得知道什麼是定語。定語是用來限定、修飾名詞或代詞的。下面是小編整理的國中英語定語從句例子，歡迎大家閱讀參考，希望幫助到大家。
【國中英語定語從句知識例子】
1.由who引導的定語從句中， who用作主語，如： This is the boy whooften helps me.
2.由whom引導的定語從句中，whom用作賓語，如：The man whom you are waiting forhas gone home.
3.由whose引導的定語從句中， whose用作定語，如： Do you know the girlwhose skirt is white?
4.由which引導的定語從句中，which用作主語或謂語動詞的賓語或介詞的賓語，如：
The room in which there is amachine is a work shop.
The river which is in front of myhouse is very clean.
This is the pen which you want.
注意：
(1)whom, which用作介詞賓語時，介詞可放在 whom、which之前，也可放在從句原來的位置上;但在含有介詞的'動詞固定片語中，介詞只能放在原來的位置上。如： He is the very person whom we must take good careof.
(2)引導非限制性定語從句時，必須用關係代詞which，不用that,如：I have lost
my bag, which I like very much.
(3)關係代詞在句中作主語時，從句的謂語動詞的人稱和數必須和先行詞保持一致。
5.由that引導的定語從句中，that可以指人或物，在從句中作主語或謂語動詞的賓語，但不能放在介詞後面作介詞賓語，如：
The book that I bought yesterdaywas written by Lu Xun.
(1)先行詞是不定代詞all, few, little, much,something, nothing, anything等，如：
All that we have to do isto practise English.
(2)先行詞被序數詞或形容詞最高階所修飾，如
The first letter that I got from him will be kept.
(3)先行詞被all, any, every, each, few,little, no, some等修飾，如
I've eaten up all the foodthat you gave me.
(4)先行詞被the only, the very, the same, thelast修飾時如
He is the only person that I wantto talk with.
(5)先行詞既有人又有物時，如:
They talked about persons andthings that they met.
(6)當句中已有who時，為避免重複，如： Who is the man thatis giving us the class?
6.由when, where, why引導的定語從句，如:
I don't know the reason why hewas late.
This is the place where we havelived for 5 years.
I'll never forget the day when Imet Mr Li for the first time.
注意：先行詞是表示地點時，如果從句的謂語動詞是及物的，就用 that(which)，如果從句的謂語動詞是不及物的，就用where引導。This is the house Which /that hehas lived in for 15 years.(Where he has lived for 15 year.)
7. 限制性定語從句和非限制性定語從句
(1)限制性定語從句是句中不可缺少的組成部分，主句和從句之間不用逗號分開。引導非限制性定語從句的關係代詞有who, whom, whose, which, of which等，這些關係代詞都不能省略。
(2)非限制性定語從句是對主句先行詞的補充說明，沒有這種從句，不影響主句意思的完整，一般用逗號把主句和從句分開，關係代詞用 which,不用that;指人時可用who,如： I have two brothers, who are both students.
8.如何簡化定語從句
(1).定語從句簡化為形容詞或形容詞短語作後置定語。如:
My grandfather lives in a village that is far away from here.
→My grandfather lives in a villagefar away from here.我祖父住在離這兒很遠的一個村子。
This is a book that is worth reading.
→This is a book worth reading. 這是一本值得看的書。
(2)定語從句簡化為現在分詞或現在分詞短語作前置或後置定語。
The man who is standing under the tree is our English teacher.
→The man standing under the treeis our English teacher.
站在樹下面的那個人是我們的英語老師。
I saw the house that was burning at that time.→I saw the burning house at thattime.
當時我看到那房子在燃燒。
(3)定語從句簡化為過去分詞短語作後置定語。
I like to see the films which are directed by Zhang Yimou.→I like to see the films directedby Zhang Yimou. 我喜歡看張藝謀導演的電影。
She is the girl who was praised at the school meeting.→She is the girl praised at theschool meeting. 她就是在校會上受表彰的那個女孩。
(4)定語從句簡化為不定式作後置定語。
He is always the first person that comes to school.→He is always the first person tocome to school.他總是第一個到校。
The report which will be given tomorrow is important to us.→The report to be given tomorrowis important to us. 明天要作的報告對我們很重要。
(5)定語從句簡化為what 從句。
I couldn't remember the words that he said.→I couldn't remember what he said.
我記不得他說的話。
【典型例題解析】
例 1 The second book ______I wantto read is Business @ the Speed of Thought.
A. which B. what C. that D. as
解析先行詞 book被序數詞修飾時要用that引導定語從句，故選C。
例 2 I'll never forget the days_____I stayed with you.
A. when B. in which C. that which
解析本題指時間，故選 A。
例 3 The book______ is sold out atthe moment.
A. you need B. what you need
C. which you need it D. that youneed it
解析 B、C、D中的what和it與先行The book相牴觸，故選 A。
例 4 Is this the place______Lincoln once lived.
A. that B. which C. where D. when
解析本題指地點，故選 C。
例 5 I'm one of the boys_________ never late for school.
A. that is B. who are C. who amD. who is
解析本題中 who用作主語，謂語動詞與先行詞theboys保持一致，故選B。
