2.注意并非所有以s结尾的词都是复数名词,比如maths,politics,physics、means,species,series,goods,news等都不是复数形式,它们作主语时谓语用三单形式。如:
Eg1. Maths is very difficult.
Eg2. The news is sad and makes everyone in the room cry.
Eg3. The quickest means of travel is by plane.
Eg4. This series is the best one.
3.the United States,the United Nations 应视为单数,作主语时谓语用三单形式。
Eg5. The United Nations was organized in 1945.
Eg6. The United States is a great nation.
4.以复数形式出现的书名,剧名,报纸,杂志名,也应视为单数。
Eg7. The Arabian Nights is a very interesting story-book.
5.fish的复数形式有两种:fish和fishes。当指同一种类的鱼时,无论是单数还是复数都用fish,为单复同形词,复数不能用fishes;当指多种不同种类的鱼时,复数用fish与fishes皆可。
Eg8. Jack caught several kinds of fishfishes yesterday.
Eg9. Those fish are of one kind.
六.知识扩展:名词的单复数在意义上的不同
有些名词从单数形式变为复数形式时,可以有特别的意义。现把较为常见的这类名词列举如下:
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