怎样识别英语单词单复数

看一下这个就知道了：一、名词复数的规则变化 1)一般情况加s。eg:map-maps bag-bags car-cars 2)以s,sh,ch,x等结尾的词加es。eg:bus-buses watch-watches 3)以ce,se,ze,(d)ge等结尾的词加s eg:license-licenses 4)以辅音字母+y 结尾的词变y 为i再加es eg:baby---babies 二、名词复数的不规则变化 1）child---children foot---feet tooth---teeth mouse---mice man---men woman---women 注意：与 man 和 woman构成的合成词,其复数形式也是 -men 和-women。2）单复同形 eg:deer,sheep,fish,Chinese,Japanese li,jin,yuan,two li,three mu,four jin 但除人民币元、角、分外,美元、英镑、法郎等都有复数形式。如:a dollar,two dollars; a meter,two meters 3）集体名词,以单数形式出现,但实为复数。eg：people police cattle 等本身就是复数,不能说 a people,a police,a cattle,但可以说 a person,a policeman,a head of cattle,the English,the British,the French,the Chinese,the Japanese,the Swiss 等名词,表示国民总称时,作复数用。eg：The Chinese are industries and brave。中国人民是勤劳勇敢的。4）以s结尾,仍为单数的名词,如：a。maths,politics,physics等学科名词,为不可数名词,是单数。b。news 是不可数名词。c。the United States,the United Nations 应视为单数。The United Nations was organized in 1945。联合国是1945年组建起来的。d。以复数形式出现的书名,剧名,报纸,杂志名,也可视为单数。"The Arabian Nights" is a very interesting story-book。是一本非常有趣的故事书。5) 表示由两部分构成的东西,如：glasses (眼镜) trousers,clothes 若表达具体数目,要借助数量词 pair(对,双); suit(套); a pair of glasses; two pairs of trousers 6）另外还有一些名词,其复数形式有时可表示特别意思,如：goods货物,waters水域,fishes（各种）鱼 三、 1）当there be 句型的主语是一系列事物时,谓语应与最邻近的主语保持一致。There is a pen,a knife and several books on the desk。。There are twenty boy-students and twenty-three girl-students in the class。2）当either… or… 与neither… nor,连接两个主语时,谓语动词与最邻近的主语保持一致。如果句子是由here,there引导,而主语又不止一个时,谓语通常也和最邻近的主语一致。Either you or she is to go。Here is a pen,a few envelops and some paper for you。3）当主语后面跟有with,together with,like,except,but,no less than,as well as 等词引起的短语时,谓语动词与前面的主语一致。The teacher together with some students is visiting the factory。He as well as I wants to go boating。四、谓语需用单数 1） 代词each和由every,some,no,any等构成的复合代词作主语,或主语中含有each,every,谓语需用单数。Each of us has a tape-recorder。There is something wrong with my watch。2） 当主语是一本书或一条格言时,谓语动词常用单数。The Arabian Night is a book known to lovers of English。是英语爱好者熟悉的一本好书。3） 表示金钱,时间,价格或度量衡的复合名词作主语 时,通常把这些名词看作一个整体,谓语一般用单数。(用复数也可,意思不变。) Three weeks was allowed for making the necessary preparations。Ten yuan is enough。