each,every
1.从含义上区别：
each和every都有“每个”的意思,但侧重点不同,each着重个别的情况,every着重全体,有“所有的”意思.
eg.She knows each student of the class.她认识班级中的每个学生.
She knows every student of the class.她认识班级里的所有学生.
2.从词性上区别：
each 可以做形容词,也可以做代词(可与of 连用）,可以用作主语,宾语,同位语.作主语时,谓语动词用单数形式.
eg.Each of them doesn't smoke.(主语）
The teacher asked each student .(宾语）
We each have a holiday.(同位语）
every 只作形容词,只能与名词连用.
eg.Every boy has a book on the desk.
区别：eg.误 Every of us has a dictionary.
正：Each of us has a dictionary.
3.用法上的区别：
eg.There are some trees on _____ side of the street.
A.both B.each C.every
从上面这道题来看,both修饰复数名词,后面应接sides,故错；each,every 都可以修饰可数名词单数,each 可以用于两者或两者以上的人或物；every则用于多者,最少是三者以上的人或物,因此答案为B.
4.everyone 指人,是代词,单独使用,不可以和of 连用.如想和of连用,则应使用 every one.
eg.Since everyone is here,let's begin.
Every one of us went there.
all是全部的意思,接复数
else:
else表示“别的”.修饰不定代词、疑问代词或疑问副词,必须位于这些词之后.如：
（1）Do you have anything else to say?你还有别的事情要说吗?
（2）Who else can play the piano?还有谁会弹钢琴?