一、清晰界限：掌握"which"与"that"的正确用法
在英语学习中，"which"和"that"这两个词虽然看似相似，但在使用上有着严格的区别。正确理解并运用这两个词，对于提升英语表达的准确性和流畅性至关重要。
二、"which"的用法：非限制性定语从句的引导词
- "which"通常引导非限制性定语从句，对先行词进行补充说明，但不是必不可少的。
例如：The book, which I bought yesterday, is very interesting.
- "which"可以引导从句对整个句子进行补充说明。
例如：She has a lot of friends, which is great for socializing.
三、"that"的用法：限制性定语从句的引导词
- "that"引导限制性定语从句，先行词通常为人或物。
例如：The man that is standing there is my brother.
- "that"在从句中作主语、宾语或表语。
例如：The book that I borrowed from you is very informative.
四、"which"与"that"的区分：先行词的情况
- 当先行词是所有格或指示代词时，只能使用"that"。
例如：The book that you gave me is very interesting.
- 当先行词是不定代词（如any, some, few, much等）时，只能使用"which"。
例如：I have read many books, but none of which is as good as this one.
五、"which"与"that"的替代词
- "which"有时可以用"whom"来代替，特别是在从句中作宾语时。
例如：The person whom you are talking about is my friend.
- "that"没有相应的替代词。
六、实战演练：通过例句加深理解
- 使用"which"的例句：
The car, which is red, is my favorite.
- 使用"that"的例句：
The book that you gave me is very informative.
七、文末QA问答
Q：在哪些情况下，我们只能使用"which"？
A：当先行词是不定代词（如any, some, few, much等）时，我们只能使用"which"。
Q：在哪些情况下，我们只能使用"that"？
A：当先行词是所有格或指示代词时，我们只能使用"that"。
Q："which"和"that"在引导定语从句时有什么区别？
A："which"引导非限制性定语从句，而"that"引导限制性定语从句。