這兩句的差別

"some" and "all" can be determiner 限定詞, pronoun or adverb, depending on how they are placed and made to function in a sentence.

限定詞種類:
- Article (a, an, the)
- Demonstrative (this, that, )
- Possessive (my, your, his, )
- Quantifier (all, some, many, few, )

2015-06-08 01:10:48 補充：
- Numeral (one, two, )
- Distributive (each, any, either, )

You can consider determiner as adjective by their function (although some grammarians separate them into different classes).

When "all" and "some" function as determiner, they are placed in front of a noun.

2015-06-08 01:52:28 補充：
indefinite pronoun 不定代詞
= a pronoun that refers to non-specific beings, objects, or places.

examples: all, another, any, anyone, anything, each, everybody, everything, few, many, nobody, none, several, some, someone, something ...

2015-06-08 02:21:11 補充：
不定代詞 that can be both Singular and Plural: all, any, some, none, ...
例：
All is forgiven.
All have arrived.
Here is some.
Some have arrived.

2015-06-08 02:27:02 補充：
Members of groups

1. when talking about members of a group in general, use 限定詞
例： all the people, some boys

2. but if talking about a SPECIFIC group of people or things, use 不定代詞 + "of the"
例： all of the people, some of the boys

2015-06-08 02:46:27 補充：
"all" can be a determinter and predeteminer.
1. as a deteminer: (unspecific 非特定)
all people, all food
2. as a predeterminer: (specific 特定)
all the people, all the food, all my money, all five men, all this mail

2015-06-08 02:51:51 補充：
"some" can only be a determiner but not predeterminer and has several meanings. 一些﹐若干 / 有些﹐一部分 / 有個﹐某個〔未知或不確指的人或物〕/ 相當多（的）

例：
some boys
some children (but not "some my children")

2015-06-08 09:39:25 補充：
但為什麼這句特定是some of the boys，無特定用some boys就好?

That is because "all" can be both determiner and predeterminer, but "some" can only be determiner.

1. All children should be taught to swim. (all - determiner; unspecific 非特定 = any children in general)

2. All the children in the sinking ship should be loaded into the lifeboats first. (all - predeterminer, the - determiner; specific 特定 = every child in the sinking ship)

2b. All his children are attending the same school.

3. The ship is sinking. All of the children should be loaded into the lifeboats first. (all - indefinite pronoun; specific 特定 = all children that are in the sinking ship)

4. Some children are prone to allergies. (some - determiner; unspecific 非特定 = a number of children in general)

5. Some of the children in ABC elementary school have caught the flu. (some - indefinite pronoun; specific 特定 = a number of children that study in ABC elementary school)
note: "some the children", "some his children" are not correct.

6. None of the boys in the ABC school has/have caught the flu. (none - indefinite pronoun; specific 特定 = not any boys who study in ABC school; not one boy)

7. "None" cannot be a determiner; "no" is used intead.
e.g. No boy has caught the flu in the ABC school.

All the people in this building will attend the meeting on Sunday.
or
All of the people in this bu8illding will attend the meeting on Sunday.

These two sentences mean the same.

Some people in this building will not attend the meeting on Sunday.
Some of the people in this building will not attend the meeting on Sunday.

Some boys like playing football while some like playing basketball.

Some of the boys in this class like playing football while some of them like playying basket.


Someone - 有些人
all - 全部