all, every, each

形容詞 each:

1. (used of count nouns) every one considered individually

副詞 each:

1. to or from every one of two or more (considered individually)
   同義詞：to each one, for each one, from each one, apiece

1. He examined each piece of evidence in isolation.
   他分別審查每一證據(jù)。
2. I asked all the children and each told a different story.
   我問過所有的孩子，每個(gè)人的說法都不一樣。
3. We each have our private views about it.
   我們每個(gè)人對這件事都有自己的看法。
4. Each man has his own name.
   每個(gè)人都有自己的名字。

each

adj.Abbr. ea.（形容詞）縮寫 ea.
Being one of two or more considered individually; every:
每，各：兩個(gè)或多個(gè)中的一個(gè)；每個(gè)：
例句：
Each person cast a vote. My technique improved with each lesson.
每人投一票。我的技巧每節(jié)課都有提高

pron.（代詞）
Every one of a group considered individually; each one.
各個(gè)，每一個(gè)：一組中視為單個(gè)個(gè)體的一個(gè)；每一個(gè)
adv.（副詞）
For or to each one; apiece:
對每個(gè)地；每一：
例句：
ten cents each.
每個(gè)十分錢

來源：
Middle English ech
中古英語 ech
from Old English ôlc * see lok-
源自 古英語 ôlc *參見 lok-

The traditional rule holds thatwhen the subject of a sentence begins witheach, it is grammatically singular,and the verb and following pronouns must be singular as well:
傳統(tǒng)規(guī)則規(guī)定，當(dāng)句子的主語以each 開始時(shí)， 語法上講是單數(shù)形式，所以動(dòng)詞及相應(yīng)的代詞也必須使用單數(shù)形式：
例句：
Each of the suites has (not have ) its (not their ) own private entrance (not entrances ).
每個(gè)套間都有（不是 have ) 它 （不是 their ) 自己的單獨(dú)入口 （不是 entrances )。

Wheneach follows a plural subject, however, the verb and subsequent pronouns remain in the plural:
當(dāng)each 位于一個(gè)復(fù)數(shù)主語后面， 則動(dòng)詞和其后的代詞仍為復(fù)數(shù)形式：
例句：
The suites each have their own private entrances (not has its own private entrance ).
每個(gè)套間都有它們各自單獨(dú)的入口（不是 has it`s own private entrance ）。

An exception is made wheneach follows the verb with a first-person plural subject: one may say eitherWe boys have each our own room or We boys have each his own room, though the latter form is somewhat stilted in modern use. ·The expressioneach and every is likewise followed by a singular verb and singular pronoun in formal style:
一個(gè)例外是當(dāng)each 前面動(dòng)詞帶有第一人稱復(fù)數(shù)形式的主語時(shí)： 既可以說我們男孩子們每人都有各自的一間房 或者也可以說 我們男孩子們每人都有他各自房間 ， 雖然后一形式在現(xiàn)代用法中有些過時(shí)。這種表達(dá)each and every ， 在正式文體中的后面也同樣地使用單數(shù)動(dòng)詞和單數(shù)的代詞：
例句：
Each and every driver knows (not know ) what his or her (not their ) job is to be. See Usage Note at every ,he
每一位駕駛員都清楚（不是 know ) 她或他的工作 （不是 their ） 是什么 參見 every,he