名词表示某一事物，有具体的和抽象的之分。分为可数名词和不可数名词。一定要注意：不可数名词都默认为单数，所以总是用is或者was;最好不要根据some、any、alotof等词去作判断，以免受误导。
1、可数名词如何变"复数形式":a.一般情况下，直接加-s,如：book-books,bag-bags,cat-cats,bed-beds;
读音：清辅音后读[s],浊辅音和元音后读[z].b.以s、x、sh、ch结尾，加-es,如：bus-buses,box-boxes,brush-brushes,watch-watches;
读音：[iz].c.以"辅音字母+y"结尾，变y为i,再加-es,如：family-families,strawberry-strawberries;
读音：[z].d.以"f或fe"结尾，变f或fe为v,再加-es,如：knife-knives,thief-thieves;读音：[z].e.以"o"结尾的词，分两种情况
1）有生命的+es如：mango-mangoes,tomato-tomatoes,hero-heroes;
读音：[z]
2）无生命的+s如：photo-photos,radio-radios;
读音：[z]
f.不规则名词复数：man-men,woman-women,policeman-policemen,policewoman- policewomen,snowman-snowmen,mouse-mice,child-children,foot-feet,tooth- teeth,fish-fish,people-people,Chinese-Chinese,Japanese-Japanese?2、不可数名词没有复数。如果要计算不可数名词所表达的数量，就得在数词和不可数名词之间加上"量词+of".
例如：aglassofwater,apieceofpaper,abottleofjuice;
练一练：1、写出下列各词的复数。this_________people_________watch_________?mango_________
child_________photo_________diary_________day_________
foot_________dress_________tooth_________sheep_________
box_________thief_________engineer_________peach_________
man_________sandwich_________woman_________leaf_________
2、用所给名词的正确形式填空。
（1）Aretheretwo_________（box）onthetable?
（2）Icanseesome_________（people）inthecinema.
（3）Howmany_________（day）arethereinaweek?
（4）Here'refive_________（bottle）of_________（juice）foryou.
（5）This_________（violin）ishers.Those_________（grape）areoverthere.
答案
1、写出下列各词的复数。
this---thesepeople--peoplewatch--watches?mango--mangoes
child--childrenphoto--photosdiary--diariesday--days
foot-feetdress--dressestooth--teethsheep--sheep
box--boxesthief--thievesengineer--engineerspeach--peaches
man--mensandwich--sandwicheswoman--womenleaf--leaves
2、用所给名词的正确形式填空。
（1）Are there two boxes （ box ） on the table?
（2）I can see some people （ people ） in the cinema.
（3）How many days （ day ） are there in a week?
（4）Here're five bottles （ bottle ） of juice （ juice ） for you.
（5）This violin （ violin ） is hers. Those grapes （grape） are over there.