that与which的用法区别。两者都可指物，常可互换。但还是有区别。下面就跟着小编一起来看看吧。
that与which的用法区别
1. 引导非限制性定语从句时，通常要用which：
The current,whichis very rapid, makes the river dangerous. 水流湍急，使这条河很危险。
He has to work on Sundays,whichhe doesn’t like. 他得在星期天工作，他是不喜欢这样的。
The London team,whichplayed so well last season, has done badly this season. 伦敦队上一个季度打得很好，这个季度却打得很差。
2. 直接放在介词后作宾语时，通常要用which：
She may be late, inwhichcase we ought to wait for her. 她可能晚到，那样我们就要等等她。
The documents forwhichthey were searching have been recovered. 他们找寻的文件已找到了。
This morning some port wine came, forwhichI have to thank you. 今天早上送来一些波尔图葡萄酒，为此我得向你道谢。
注：有时“介词+which”引导的定语从句可以转换成“介词+which+不定式”结构：
He had only the long nights inwhichhe could . =He had only the long nights inwhichto . 他只有漫漫长夜可用来。
He had a couple of revolvers withwhichhe could defend himself.= He had a couple of revolvers withwhichto defend himself. 他只有一两把枪用来自卫。
3. 当先行词是下列不定代词或被它们修饰时much, little, none, all, few, every(thing), any(thing), no(thing) 等时，通常用that： Allthatshe lacked was training. 她缺的只是训练。
Have you everythingthatyou need? 你需要的东西都有了吗?
The sleeping man’s subconscious mind retained everythingthatwas said around him. 这位酣睡的人头脑的下意识能记住他周围的人说的话。 She would never do anythingthatwas not approved of by her parents. 她父母不赞同的事她绝不会做。
4. 当先行词有the very, the only, the same 等修饰时，通常用that： This is the only examplethatI know. 我知道的例子只有这一个。 Those are the very wordsthathe used. 那是他的原话。
5. 当先行词有形容词最高级或序数词(包括last, next等)等修饰时，通常用that：
This is the best dictionarythatI’ve ever used. 这是我用过的最好的.词典。
The first thingthatyou should do is to work out a plan. 你应该做的第一件事是订个计划。
6. 当关系代词在定语从句中用作表语时，通常用that：
China is not the country (that) it was. 中国已不是过去的中国了。
7. 当先行词是一个既指人又指物的并列词组时，通常用that：
They talked about the persons and thingsthatmost impressed them. 他们谈论了使他们印象最深的人和事。
8. 当要避免重复时：
Whichis the coursethatwe are to take? 我们选哪门课程?
当先行词指物时只能用that而不能用which的几种常见情况
1 先行词为 all, anything, everything, nothing, much, none, little 等不定代词时。
如 There is nothingthatcan stop him from doing it
2 先行词前有 last, next, only，very 及序数词、最高级等修饰时。如This is the most interesting filmthatwas shown last week这是上周所放映的 影片中最有趣的一部。
The only thingthatthey can do is to wait他们唯一能做的事就是等待。
3 先行词前有序数词或最高级等修饰时。
如This is the second computerthatfather has just bought
这是爸爸刚刚买的第 二台电脑。
This is the very pen (that) you bought yesterday
这正是你昨天买的笔。
4当先行词既有人，又有物时。
如Sally is talking about the writer and his bookthatinterests her 萨丽在谈 论这位作家及能使 她感兴趣的这位作家的书。
5 当主语是 who 的疑问句。
如Who is the boythatis playing computer games?
在玩电脑游戏的男孩是谁?
当先行词指物时，只能用which而不能用that的场合
1关系代词前有介词时。
如This is the house inwhichTom once lived这是汤姆曾经住过的房子。
2 在非限定性定语从句(即通常用逗号与主句隔开，如果去掉逗号， 整个句子仍能表达 完整的意义的定语从句)中。
如 They are talking about the TV play,whichthey saw last night 他们正在谈论 昨晚看的电视剧。
