知识点1:英语中的缩写词如何变复数
缩写词在变复数时，通常是在词尾加-'s构成，有时也加-'s。如：
I know two MP's [MPs] personally. 我与两位下院议员有交往。
度量衡单位的缩写词的复数形式。一般不加词尾-s。如：
m (meter, meters) 米
km (kilometer, kilometers) 千米[1]kilometer单词记忆法

◆记忆方法一：联想方式：kilo—千 metre—米记忆方法：千米=公里◆记忆方法二：词根词缀记忆法：kilometer公里（kilo+meter米→一千米，公里）,kilo-表示“一千”

kg (kilogram, kilograms) 千克
cm (centimeter, centimeters) 厘米
有的缩写词在构成复数时也加词尾-s。如：
hr (hours) / hrs (hours) 小时
No (number) / Nos (Numbers) 号码
有个别缩写词采用重复最后一个字母的方式构成复数形式。如：
p. 365 = page 365 第 365 页
pp. 100-123 = pages 100 through 123 第 100 至 123 页
知识点2:复数代词THEY, THEM, THEIR 可以表示单数意义吗
在通常情况下，复数代词they, them, their 表示复数意义。如：[2]heir单词记忆法

◆记忆方法一：heir n. 继承人同义词：successor n.继承人

As is usual with children, they soon got tired. 孩子们一贯如此, 他们很快就厌倦了。
Although they are twins, they look entirely different. 他们虽是孪生，但是相貌却完全不同。
If the trees had been given more attention, they could be grown better. 要是对这些树多加注意，它们会长得更好些。
When guests leave the host usually sees them out. 客人走时，主人通常送出门。
We invited 12, but only a handful of them came. 我们邀请12人，但只有几个人来。
The Irish are very proud of their sense of humour. 爱尔兰人为自己的幽默感而自豪。[3]humour单词记忆法

◆记忆方法一：联想方式：hu（湖）；m（山）；our（我们的） 记忆方法：湖边的山上是我们谈笑幽默的地方。

Most of the families have modernized their kitchens. 大多数家庭已实现厨房设备现代化。
但是，在实际运用中，有时也可以用复数代词they, them, their来指代性别不明的单个人（即单数）。如：
Everyone knows what they have to do, don't they? 每个人都知道自己必须做什么，对吗？[4]have to,have,相关知识点

have go还是have to gohave go还是have to go请看下面的题，是选have go还是have to go?Whom would you rather _________ with you, Jim or Jack?A. have go B. have to go C. have gone D. has to go有的同学从一看选项便首先排除了A，认为

If either David or Janet come, they will want a drink. 大卫或珍妮特来的话，是会要喝酒的。
If any of them comes to see me, let them wait for me to come back. 如果他们中有人来看我，请叫他们等我回来。
When a person gets married, they have to start thinking about their responsibilities. 一个人结了婚，他们就得考虑考虑自己的责任。[5]their,they,相关知识点

复数代词THEY, THEM, THEIR 可以表示单数意义吗在通常情况下，复数代词they, them, their 表示复数意义。如：As is usual with children, they soon got tired. 孩子们一贯如此, 他们很快就厌倦了。Although they are twins, they look entirely different.

知识点3:谓语动词用复数的情况[6]谓语动词,动词,相关知识点

谓语动词切忌用“行为动词1 + 原形动词”、“be + 原形动词”。○4have+过去分词。如：Many trees have been cut down since 1970s.（意思同上）○5般时问句和否定句中：do/does/did+原形动词。如：He does not enjoy himself very much.（他日子过的不好。）Did any of you se

None of the books attract me a lot.
the number of表示“……的数量”，谓语动词用单数。[7]谓语,单数,相关知识点

management作主语时谓语用单数还是复数management作主语时谓语用单数还是复数1. 若表示“管理层”“管理人员”，为集合名词；用作主语时，谓语动词可用单数（视为整体）或复数（考虑其个体）。如：The management is having talks with the workers. 管理人员正在和工人谈判。 The management want all t