不定代名詞
1. some 與 any：some與 any 除了可以當名詞外，亦可當形容詞。Some用在肯定句，any則可用在肯定句、疑問句、否定句，或條件句。
例：
1. The soldiers fired at the crowd without any reason. (without為否定)
2. Come and see me if you have any time. (if表達條件)
3. Some of his stories were quite interesting. (肯定句)
4. You can borrow any books you like. (any用於肯定句，表達“任何”)
請注意，以~one, ~thing, ~body為結尾的字，如someone, something, anyone, anything, anybody, somebody等，皆為單數。
2. both(兩者皆是)，neither(兩者皆非)，either(兩者其中之一)，all(三者以上皆是)，none(三者以上皆非)，any(三者以上任何一個)
請注意，上述六個代名詞除了none之外皆可當形容詞，both指複數，而neither與either指單數。
例：
1. Neither of the two roads is very good. (Neither當名詞)
2. Both parties are eager to reach an agreement. (Both當形容詞)
3. There stood many people on either side of the street. (either當形容詞)
4. A：Which of the three pens do you want?
B：Any will do. (Any當名詞)
註：not可與either連用，表達“也不”，但不能與neither連用，否則會造成雙重否定。例如，“ I have not read this book, and my brother has not neither.”(應將neither改為either)
3. one‥, the other‥：表達“一個‥，另一個‥”(指兩者)
one‥，another‥：表達“一個‥，另一個‥”(指三者以上)
例：
1. There are two white buildings on this street. One is the library and the other is the hospital.
2. I don’t like this one；please give me another.
Some‥；others‥
Some+複數名詞‥； other+複數名詞‥
表達“一些‥，另一些‥”(此種結構皆使用複數)
例：
1. Some people enjoy working；others don’t.
2. Some of the students were talking；the others were reading.
4. another+單數可數名詞 other+複數可數名詞
the(any, no)+other+單數或複數皆可
例：1. You should try another way to solve the problem.
2. There were other students coming to the party.
3. Do you have any other book(books) on this subject?
5. +of+ the或所有格+N+V
Most
All
Some
None
Half
The rest (其餘)
Fraction (分數)
Percentage (百分比)
上列結構有兩大重點：(a)動詞的單複數由N決定，(b)the或所有格不可以省略。
例：
1. Most of the population in the rural areas is composed of(由‥組成) manual laborers(勞工)。
2. Two-thirds of his books have been published.
3. Ten percent of the pupils(學生) are absent today. (請注意。percent不能加s)
