后置定语的用法多样，以下是一些常见情况的说明：
1. 当形容词修饰由every-, some-, any-, no-加body, one, thing等构成的复合不定代词时，需置于其后，如：“Have you ever met anyone famous?”（你曾遇见名人吗？）和“He did everything possible to help us.”（他尽其所能帮助我们）。但若形容词前有定冠词，如“the mysterious something”，则形容词不需后置。
2. 形容词组作定语时，需置于被修饰名词之后。例如，表达“足够勇敢的学生”，正确形式为“Students brave enough”，这相当于定语从句“who are brave enough”。
3. 两个形容词并列作定语时，如“large and small”或“new or old”，也需后置，如“Power stations, large and small, have been set up all over the country.”
4. 形容词else常用于不定代词或疑问代词后，如“Anything else I can do for you?”，表示“别的事情”。
5. 比较等级形容词结构修饰名词时，如“larger than”或“farthest from”，需后置，如“The Smiths need a car garage twice larger than this one.”
6. 基数词加时间或度量单位的形容词结构，如“28 years old”，也应置于名词之后，如“Yesterday, a Mr. Brown, 28 years old, came to visit you.”
7. 以a-开头的形容词如alive, alike, alone, awake等，需置于被修饰名词之后，如“She was the only person awake at that night.”
8. 形容词responsible的含义变化影响其位置：作“可信赖的”前置，作“有责任的”后置，如“He is a responsible man.”和“The man responsible should be their manager.”
9. 形容词present的含义变化也会影响位置：作“现在的”前置，作“出席的”后置，如“What is your present address?”和“The professors present at the meeting came from Shandong University.”
10. 形容词worth构成的词组作定语，通常后置，如“A car worth $80,000 is not too dear for him to buy.”
11. 动词不定式作后置定语时，通常表示未完成的动作，如“a tall building worth 200,000 dollars in all has been sold to a foreigner.”
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