too和also
too作为“还”的意思时,用在句末.例如：
There are many trees ,too.
too还有两种词组的运用,分别是much too和too much.
much too …的多 例如：LaoMing is much too bigger than me.
too much 太多 例如：There is too much food.
also作为“还”的意思时,用在句中.例如:They also have many books.
none 通常只有一个词组 none of them/us,要注意这时的谓语动词用第三人称单数.
none of them 与 not one of them 意思一样,可互相转换.
either 和 neither
either 用法是 either … or … 或者…或者… 讲究就近原则
例如:He plays either football or basketball.
他或者踢足球或者打篮球.
neither 用法是 neither … nor… 既不 … 也不… 连接两个并列的主语,讲究就近原则.
例如：Neither he nor I speak English.
他和我都不讲英语.