定语从句的难点在于主从句之间的内部逻辑。
关于这一点，我在以前也有比较详细的解释：
实用英语语法 第二十五讲 定语从句
定语从句还是同位语从句，记住一句话，就能轻松来区别
今天和大家一起来具体复习如果先行词（即被定语从句修饰的词）在从句中是主语或宾语，我们怎么选择that和which。
一， 先行词是人，用that/who/whom引导从句；不能用which：
He that/who fears death lives not.
贪生怕死死的快。
A person that/who will swear, will lie.
开口就赌咒发誓的人往往在说谎。
I really admire people that/who speak two languages.
我真的很佩服会说两种语言的人。
（先行词在从句中做主语，用who/that）
There are always people (whom/who/that) you don’t get along with.
总有一些你没法相处好的人。
二，先行词是物，which和that都可以用：
She has a small office which is used for private discussions.
她有一间小办公室，用来私人会谈。
There is a kind of pleasure which/that comes from giving away.
付出带来一种快乐。
Anger is a wind which/that blows out the lamp of the mind.
愤怒是吹灭心灵之灯的风。
（愤怒使人丧失理智。）
三，先行词是代词，用that/who不用which：
Is there anything else that you"d like?
还再要点其他的吗?
God helps those who help themselves.
天道酬勤。
Money is something that most people will never stopping chasing.
大多数人永远不会停止追逐金钱。
There is nothing that can stop him from going there.
没有什么能阻止他去那儿。
You can accomplish all that you desire if you put your heart and soul in it.
如果你全身心投入，你就能实现你所渴望的一切。
但是如果他that为先行词，为了不重复用which:
That which does not kill us makes us stronger.
那些杀不死我们的东西最终只会使我们变得更加强大。
Never deter till tomorrow that which you can do today.
今日事须今日毕，切勿拖延到明天。
四，先行词前有以下限定词，更多用that：
much, little, none, all, few, every, any, no；the very, the only, the same；形容词最高级或序数词
The best book that I read this year was "The Da Vinci Code."
我今年读的最好的书是《达芬奇密码》
The first thing that he noticed of her was her dark, long hair.
他首先注意到她的是一头又黑又长的头发。
They met the very afternoon that he spent in the library.
他们是在他在图书馆度过的那个下午认识的。
So many traffic accidents that led to serious injuries are caused by drunk driving.
很多导致严重伤害的交通事故都是由酒驾造成的。
Parental love is the only love that is truly selfless, unconditional and forgiving.
父母的爱是唯一真正无私、无条件和宽容的爱。
The only thing that is worse than being blind is having sight but no vision.
唯一比失明更糟糕的是有眼无珠。
关于这一点，不能说用which就是错的！
五，可以用介词加which，不能用介词加that：
Your metabolic rate is the speed at which your body transforms food into energy.
新陈代谢的速度是你的身体将食物转化为能量的速度。
Behavior is a mirror in which everyone shows his image.
行为是一面镜子，每个人都把自己的形象显现于其中。
Experience is a school from which one can never graduate.
经验无止境。
Life is a flower of which love is the honey.
生命如花，而爱是它的蜜。
六，非限制性定语从句里，用which不用that：
The wisdom of nations lies in their proverbs, which are brief and pithy.
民族之智慧蕴藏于其简短而有力的谚语中。
Unprofitable eloquence is like the cypress, which is great and tall, but bears no fruit.
夸夸其谈不济事，柏树参天不结果。
It"s raining, which probably means that the football match will be cancelled.
下雨了，这可能意味着足球赛将被取消。
（which可以指代整个全句哦！）
八，如果先行词在从句中做宾语，that/who/whom/which都可以省略：
There are two points (which/that) I wanted to make.
我想说两点。
The cell is the unit (that/which) all living organisms are composed of.
细胞是构成所有生物的单位。
There are some things (that/which) you learn best in calm, and some in storm.
你会在风平浪静时学会一些事情，在暴风骤雨中学会另外一些。
图片选自网络，版权为原作者所有！
