01 知识点
相互代词：表示相互关系的代词叫做相互代词，它与其所指代的名词或者代词是互指关系。译为：彼此，互相。
相互代词有each other和one another。
相关知识点：
✦ 二者区别：
each other用于两者之间
one anther用于三者或三者以上的人之间
✦ 只在句中用作宾语。
They often help each other/one another. 他们经常互相帮助。【作动词宾语】
They never talk to each other when they do their homework.
当写作业的时候，他们互不讲话。【作介词的宾语】
✦ 所有格形式（each other's, one another's）：表示所属关系。
They often check each other's homework. 他们经常互相检查作业。
02 小练笔
1.Jane and I are good friends. We often help（ ）.
A.another B.others C.the other D.each other
2. Tom is my best friend.We often help（ ）.
A.another B.each other C.the other D.others
3.They met（ ）and wrote down（ ）exact address.
A. each other; each other B. each other's; each other
C. each other's; each other's D.each other; each other's
4.Students should help（ ）.
A. one another B. another C.others D.the other
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答案：D B D A
