可以修饰名词(all/both+(the)+名词),也可以独立使用,采用“all/both + of the +名词(复数)”的形式,其中的of 可以省略。如:All (of) (the) boys are naughty.(是男孩都调皮)Р(4)every和each用法:Рevery是形容词,只能作定语修饰单数名词,意思是“每一个”,表示整体概念;Рeach是形容词、代词,可用作主语、宾语、定语等,意思是“每个”或者“各个”,表示单个概念;each可以放在名词前,可以后跟of短语,与动词同时出现时要放在“be动词、助动词、情态动词”之后或者行为动词之前Рevery和each都用作单数理解,但是下文中既可以用单数的代词(如he/him/his)也可以用复数的代词(如they/them/their)替代。如:Every one of the students in his class studies very hard.(他班上每个学生学习都很用功) / They are very busy. Each of them has something to do.(他们很忙,人人都有事干) Р(5)either和neither的用法:Рeither意思是“两个中间的任何一个”;neither是either的否定形式,意思是“两个都不”。Рneither和either在句子中可作主语、宾语和定语等,都用作单数。如:I don’t care much for what to drink. Either of the two will do. (我不介意喝些什么,两个之中随便哪个都行) / --Will you go there by bus or by car? –Neither. I will go there by train.(你坐公车去还是坐轿车去?一个都不坐,我坐火车去。)