all和all of使用上有和区别？举例

Question

all the students等于all of the students吗

Answer 1

意思相同(基本没有区别)，但词性不同，语法作用不同。
第一个all是限定词或形容词，第二个all是代词。
又比如I have eaten it all=I have eaten all of it. 我把它全吃了。(代词)
All horses are animals. (形容词)

Answer 2

All animals can not live without water.
(泛泛而指)
All of the students are from the USA.
(特指)