查看“单复数”的源代码

*different, various 等表示大于1的数字时候，后面接负数
*differnt kinds of 

*否定形式后面也可以接复数
*Not any are working.

*Everyone本身是单数，但是对应的意思是复数
*Everyone wants their work published quickly.

*That,It 用第三人称单数
*which,that不一定
 there are four apples that belong to me

*every总是修饰单数名词，后接单数动词。
*each作为形容词，修饰单数名词，接单数动词。作为代词，单独使用，接单数动词；放在复数名      词和代词后作同位语，接复数动词。
*each of +名词复数作主语，后面的谓语动词用单数。
    (1)every one,Eg:Every one of them goes to the same factory.
    (2)Each man carries his own bag. （修饰单数名词）
        Each carries his own bag. (代词)
        We each have our own office. (作We的同位语).
    (3)Each of them goes to a different factory.