Each和every的意思相近，意为“每个”，在一些句式中可以替换使用，比如：
Each time I see you, you look different.
Every time I see you, you look different.
但是两者又不完全相同。区别在哪里呢？
认清Each
We use each when we think of things separately, one by one，即，把每个当做个体来看待。
例：Put each ball on the table carefully. = put each ball one by one.
认清Every
We use every when we think of things as a group. The meaning is similar to all.当我们把每个事物看成一个整体时，我们通常使用every。
例：Every ball in the bag is on the table.= all balls in the bag
Every可以用来表达频率:
‘How often do you use your car?’
‘Every day.’ (not Each day)
Each与Every用法对比
1. Each通常用于小数量的物品，Every通常用于大数量的物品：
There were four books on the table. Each book was a different colour.
At the beginning of the game, each player has three cards.
Kate loves reading. She has read every book in the library. (= all the books)
I’d like to visit every country in the world. (= all the countries)
2. Each可以加名词，也可以不加。Every后面一定要加名词。
Each room is different. (each noun)
None of the rooms are the same. Each is different. (each）
Every room in this hotel is different. (every noun)
3. 我们可以使用each of...(... 中的每一个)
但是不可以使用every of。Every one of...是可行的。
Each of the books was a different colour. (not each of books)
Each of them was a different colour.
Read each of these sentences carefully
I’ve read every one of those books. (not every of those books)
I’ve read every one of them.
Each的其他使用规则
1. Each可以用于指代双方：
In football, each team has eleven players. (not every team)
2. Each既可以用在句首，也可以用在句尾：
The students were each given a book. = Each student was given a book.
3. 在表达单个物品的价钱时，我们通常使用each：
These oranges are 40 pence each. (each = for one orange)
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