1、先行詞指人時(shí)，引導(dǎo)詞可用Who,Whom,及that,其中當(dāng)引導(dǎo)詞在句中作主語時(shí)用Who或that;當(dāng)其充當(dāng)賓語時(shí)用whom或that，在非正式賓語中也可用who，也可省略。
a That boy who/that broke the window is called Tom.
b The person to whom you just talked is Mr Li.
b 句可改為：The person(that/whom/who)you just talked to is Mr Li.
2、先行詞指物時(shí)，引導(dǎo)詞用that或which
a.They planted the trees which didn’t need much water.
b .The fish (which)we bought were not fresh.
3、先行詞指時(shí)間時(shí)，引導(dǎo)詞用When/on which或in which
a.I still remember the day when/on which I first came to Bei jing.
b.I'll never forget the year when/ on which we worked on the farm.
4、先行詞指地點(diǎn)時(shí)，引導(dǎo)詞用Where或in which
This is the house where/in which we lived last year.
或:This is the house that/which we lived in last year.
5、whose在定語從句中作定語時(shí)，可用來指人，也可以用來指物，如:
a.This is the boy whose mother died a month ago.
b.This is the house whose windows were broken.此句可改成：
This is the house the windoues of which were broken.
6、先行詞表示原因時(shí)，引導(dǎo)詞用why,如:
The reason why he was late for school was that he had been knocked down by a bike.
二、物殊情況：
盡管有以上基本原則，但要學(xué)好定語從句更應(yīng)注意以下特殊情況;
Ⅰ、當(dāng)定語從句的先行詞為表示人的不定代詞，如 anyone,anybody,everyone,everybody,noone,nobody,all， these ，those等時(shí),用who而不用that
Those who break the rule are pulished.
Anybody who had eyes could see the elephant was like a snake.
Ⅱ.以who或which作主語的特殊疑問句中先行詞指人，引導(dǎo)詞只用That,如:
a.Who is the person that is standing at the gate ?
b.Which of you that knows something about English doesn’t know this word?
Ⅲ、先行詞指物時(shí)引導(dǎo)詞用that而不用which的情況:
1、先行詞有序數(shù)詞或形容詞級修飾時(shí)，
This is the best composition that has been written in English.
2、先行詞是all,something,anything,nothing,everything,little,few,much等不定代詞時(shí)
There is nothing/little/much that we can do for her.
3、先行詞被all,every,no,some,any,little,much等修飾時(shí)
I’ve read all the books that you gave me.
4、先行詞被the only/very等修飾時(shí)
This is the very/last place that they visited yesterday.
5、有兩個(gè)以上先行詞，分別表示人或物時(shí)
They talked about the teachers and the schools that they had visited.
6、先行詞為基數(shù)時(shí)
Yesterday I caught two fish,Now you can see the two that are still alive in a basin of water.
Ⅳ.time為先行詞時(shí)，前邊如有序數(shù)詞修飾時(shí)，定語從句引導(dǎo)詞用that或什么也不用，如沒序數(shù)詞修飾時(shí)，用when或that均可
a.This is the last time(that)I shall give you a lesson.
先行詞指人時(shí)，引導(dǎo)詞可用Who,Whom,及that,其中當(dāng)引導(dǎo)詞在句中作主語時(shí)用Who或that;當(dāng)其充當(dāng)賓語時(shí)用whom或that，在非正式賓語中也可用who，也可省略。
a That boy who/that broke the window is called Tom.
b The person to whom you just talked is Mr Li.
b 句可改為：The person(that/whom/who)you just talked to is Mr Li.
2、先行詞指物時(shí)，引導(dǎo)詞用that或which
a.They planted the trees which didn’t need much water.
b .The fish (which)we bought were not fresh.
3、先行詞指時(shí)間時(shí)，引導(dǎo)詞用When/on which或in which
a.I still remember the day when/on which I first came to Bei jing.
b.I'll never forget the year when/ on which we worked on the farm.
4、先行詞指地點(diǎn)時(shí)，引導(dǎo)詞用Where或in which
This is the house where/in which we lived last year.
或:This is the house that/which we lived in last year.
5、whose在定語從句中作定語時(shí)，可用來指人，也可以用來指物，如:
a.This is the boy whose mother died a month ago.
b.This is the house whose windows were broken.此句可改成：
This is the house the windoues of which were broken.
6、先行詞表示原因時(shí)，引導(dǎo)詞用why,如:
The reason why he was late for school was that he had been knocked down by a bike.
a That boy who/that broke the window is called Tom.
b The person to whom you just talked is Mr Li.
b 句可改為：The person(that/whom/who)you just talked to is Mr Li.
2、先行詞指物時(shí)，引導(dǎo)詞用that或which
a.They planted the trees which didn’t need much water.
b .The fish (which)we bought were not fresh.
3、先行詞指時(shí)間時(shí)，引導(dǎo)詞用When/on which或in which
a.I still remember the day when/on which I first came to Bei jing.
b.I'll never forget the year when/ on which we worked on the farm.
4、先行詞指地點(diǎn)時(shí)，引導(dǎo)詞用Where或in which
This is the house where/in which we lived last year.
或:This is the house that/which we lived in last year.
5、whose在定語從句中作定語時(shí)，可用來指人，也可以用來指物，如:
a.This is the boy whose mother died a month ago.
b.This is the house whose windows were broken.此句可改成：
This is the house the windoues of which were broken.
6、先行詞表示原因時(shí)，引導(dǎo)詞用why,如:
The reason why he was late for school was that he had been knocked down by a bike.
二、物殊情況：
盡管有以上基本原則，但要學(xué)好定語從句更應(yīng)注意以下特殊情況;
Ⅰ、當(dāng)定語從句的先行詞為表示人的不定代詞，如 anyone,anybody,everyone,everybody,noone,nobody,all， these ，those等時(shí),用who而不用that
Those who break the rule are pulished.
Anybody who had eyes could see the elephant was like a snake.
Ⅱ.以who或which作主語的特殊疑問句中先行詞指人，引導(dǎo)詞只用That,如:
a.Who is the person that is standing at the gate ?
b.Which of you that knows something about English doesn’t know this word?
Ⅲ、先行詞指物時(shí)引導(dǎo)詞用that而不用which的情況:
1、先行詞有序數(shù)詞或形容詞級修飾時(shí)，
This is the best composition that has been written in English.
2、先行詞是all,something,anything,nothing,everything,little,few,much等不定代詞時(shí)
There is nothing/little/much that we can do for her.
3、先行詞被all,every,no,some,any,little,much等修飾時(shí)
I’ve read all the books that you gave me.
4、先行詞被the only/very等修飾時(shí)
This is the very/last place that they visited yesterday.
5、有兩個(gè)以上先行詞，分別表示人或物時(shí)
They talked about the teachers and the schools that they had visited.
6、先行詞為基數(shù)時(shí)
Yesterday I caught two fish,Now you can see the two that are still alive in a basin of water.
Ⅳ.time為先行詞時(shí)，前邊如有序數(shù)詞修飾時(shí)，定語從句引導(dǎo)詞用that或什么也不用，如沒序數(shù)詞修飾時(shí)，用when或that均可
a.This is the last time(that)I shall give you a lesson.
先行詞指人時(shí)，引導(dǎo)詞可用Who,Whom,及that,其中當(dāng)引導(dǎo)詞在句中作主語時(shí)用Who或that;當(dāng)其充當(dāng)賓語時(shí)用whom或that，在非正式賓語中也可用who，也可省略。
a That boy who/that broke the window is called Tom.
b The person to whom you just talked is Mr Li.
b 句可改為：The person(that/whom/who)you just talked to is Mr Li.
2、先行詞指物時(shí)，引導(dǎo)詞用that或which
a.They planted the trees which didn’t need much water.
b .The fish (which)we bought were not fresh.
3、先行詞指時(shí)間時(shí)，引導(dǎo)詞用When/on which或in which
a.I still remember the day when/on which I first came to Bei jing.
b.I'll never forget the year when/ on which we worked on the farm.
4、先行詞指地點(diǎn)時(shí)，引導(dǎo)詞用Where或in which
This is the house where/in which we lived last year.
或:This is the house that/which we lived in last year.
5、whose在定語從句中作定語時(shí)，可用來指人，也可以用來指物，如:
a.This is the boy whose mother died a month ago.
b.This is the house whose windows were broken.此句可改成：
This is the house the windoues of which were broken.
6、先行詞表示原因時(shí)，引導(dǎo)詞用why,如:
The reason why he was late for school was that he had been knocked down by a bike.