单复数

可数名词

• 单复数同形的名词： literature，staff,faculty

• 不规则复数形式

index --> indices

formula --> formulae

locus --> loci

torus --> tori

modulus --> moduli

不可数名词

• 比如evidence,information,equipment,manpower等
• 可以用a lot of, a piece of, many/several pieces of

其它

• different, various 等表示大于1的数字时候，后面接负数

different kinds of

1.3 meters

• 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。

Every one of them goes to the same factory.

• 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 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).

• each of +名词复数作主语，后面的谓语动词用单数。

Each of them goes to a different factory.