物件名称：

　　The bellows(or scissors，pincers，tongs，forceps，shoes，pants，shorts，glasses，etc.)are lying in the corners.

　　A pair of bellows(or scissors，pincers，tongs，etc.) is lying idle.

　　有些动物的名字并不带-s或-es词尾，但可以用作复数或单数名词：

　　Salmon(or Trout)(作为食品)is delicious.

　　These salmon(or trout) are caught in that river.

　　Fish(作为食品) is their only food.Three fishes are visible in the water.A lot of fish are caught.

　　Poultry(作为食品)is delicious.The poultry(作为活的动物)are drinking water.

　　The sheep is(or are)sleeping.

　　A deer is playing.Some deer are running.

　　有些名词似乎不可数，却可有单复两种形式，有不同意义：

　　His career has reached its climax.Their careers have been suc-cessful.(一个人有一番事业。许多人有许多番事业。)

　　His beard is impressive.Their beards are long.

　　The mane of this horse is thin.The manes of those horses are thick.

　　His offspring is healthy.Their offsprings are all soldiers.

　　The population of this city is thin.The populations of these two cities are similar.

　　The language of the U.S.A.is English.The languages of Britain and the U.S.A.are almost the same.

　　The alphabet of English is twenty-six letters.

　　The alphabets of English and French are a little different from each other.

　　有些学科的名称，虽以-s结尾，却都作单数看待：

　　Mathematics is an important subject in schoo1.

　　Economics is a study of production and consumption.

　　Dramatics is his subject.And accoustics，too.

　　如果一个学科名称用来表示某些实际事务，则可作为复数：

　　My mathematics are poor.

　　The economics of this country are stable.

　　Such politics are foolish.Such tactics are ridiculous.

　　Gymnastics are popular today.

　　The ethics of some politicians are doubtful.

　　Statistics on this subject are incorrect.

　　某些以-s结尾的游戏或球类名称作为单数看待：

　　Billiards(or Bowls，Dominos，Draughts)is my favourite game.

　　但：Cards are not interesting to me.

　　以-ese结尾的国民名称可作为单、复两种形式：

　　That Japanese(or Chinese，Portuguese，Vietnamese)is my friends.

　　Those Japanese(or Chinese，Portuguese，Vietnamese) are my friends.

　　有些外来术语，有特别的单数及复数形式：

　　This axis(or medium，radius，larva，analysis，criterion，Phenomenon，oasis，libretto，soprano)is…(单数形式)

　　Those axes(or media，radii，larvae，analyses，criteria，phenomena，oases，libretti，soprani)are...(复数形式)

　　The data is(or are)...

　　由一个形容词加the来代表一类人时，都作为复数：

　　The honest(= The honest people)are always trustworthy.

　　The poor are to be relieved.

　　The blind are unfortunate.

　　The strong，the rich，the wicked are respected as the wise.

　　The oppressed are to rise one day.

　　有个别这类形容词代表单个的人，后面要跟单数动词(这些多为法律用语)：

　　The dead(or deceased，departed)was fifty years of age.

　　The bereaved is(or are)still young.

　　The condemned(or accused)is absent.

　　His intended(or betrothed)is young.

　　有些形容词加the后表示抽象概念或具体东西，但都作单数看待：

　　The beautiful(= Beauty)is the ideal of life.

　　The true looks less attractive than the false.

　　The familiar is always more desirable than the unknown.

　　The inside of the palace is more beautiful than the outside.(the inside=the inside part)

　　The white of an egg is full of protein.