英语中either既可以做代词表示两者之中的任何一个,也可以做副词,意思是也,用于否定句,往往放在句子的末尾,用逗号隔开。
例如
Either of the two students is reading in the room.
I don't like English ,either.
英语中too是可以做副词,意思是也,放在句子的末尾,逗号隔开,用于肯定句。too也可以做副词,意思是太,修饰其他的形容词或者副词。
例如
The subject is too difficult for me to study
I like English ,too.
英语当中both可以做代词,意思是两者都。
Both of the students are reading in the library.
Both the teacher and the boy are ready in the library.