(1) 形容词在句中作定语, 表语, 宾语补足语。例如：
Our country is a beautiful country. （作定语）
The fish went bad. （作表语）
We keep our classroom clean and tidy. （作宾语补足语）
(2) 形容词修饰something, anything, nothing, everything等不定代词时,形容词放在名词后面。
I have something important to tell you.
Is there anything interesting in the film.
(3) 用 and 或 or 连接起来的两个形容词作定语时一般把它们放在被修饰的名词后面。起进一步解释的作用。
Everybody, man and woman, old and young, should attend the meeting.
You can take any box away, big or small.
(4) the＋形容词表示一类人或物
The rich should help the poor.
