第1个回答 2014-03-02
either 也，用于否定句末。
also也‘ 肯定句句中,实义动词前，助动词，情态动词和BE 动词后。
or 或者’连接两个并列成分，也用于否定句中的并列； 否则
too 也，用于肯定句句末，一般用‘，’隔开‘
如
He isn't a worker , she isn't a worker ,either.
I also have a pen .
There is no water or life on the moon .
Work hard ,or you will be late . ( 否则）
He is also a student.
He is a student, she is a student, too.
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第2个回答 2014-03-02
either 两个中的一个
经常用either...or...
可以连接词和词或句子和句子
例子：you can choose ethier red or blue
either he went to the market, or he stay at home
also 也
放实意动词前
例子：i also play the piano
放be动词或助动词后
例子：i was also a dancer
i have also brought some candy
放句首
例子：also, i went to the party
不放句尾
or 或
连接词和词或句子和句子
例子：i can go swimming or runing
i can go to swim or to run
i can go shopping ot i can join the party
too 也
放句尾
例子：i like her, too.本回答被提问者采纳