墨尔本文波雅思为大家视频讲解定语从句的相关语法应用。定语从句指的是在复合句中充当定语成分的一个句子，由关系词引导。其中，关系代词有who, whom, which,that, whose,
关系副词有when, where, why.
After a whole day of hard work, all what he wanted was a nice meal & a good rest. 是错误的哦！
Yesterday I ran into an old friend.
I hadn’t seen him for years.
Yesterday I ran into an old friend (whom/ that) I hadn’t seen for years.
1)that 可以代替其他关系词如who, whom, which用于指人或物，但绝不能代替whose.
This is the book you were looking for.
Tom is a boy who always tells lies.
3) 必须用that引导的定语从句 (that有时可以省略)：
1. noun= any body
all/ much/ none/one
All is not gold that glitters.
2. noun = …est
This is the very book (that) I need.
④as也可引导限定性定语从句， 先行名词被so, as, such, the same修饰，从句的引导词用as
I have never seen such a boring guy as he is before.
This is exactly the same camera as (that) I have lost.