名词单数变复数 What’s this in English? It’s an apple. What are these? They are two apples. --What are these? --What’s this? --It’s a pen. --They are pens. --What are those? --What’s that? --It’s an English book. --They are English books. backpacks watches oranges pens --What’re these ? --They’re … . maps cases keys --What’re those ? --They’re … . 单数 复数 可数名词 如　何　变　化？ 规则变化 不规则变化 规则变化 1.一般情况下，直接在词尾加-s构成复数形式。 car backpack cars backpacks book books 1. name pen card ruler names pens cards rulers box 2. 以s, x, ch, sh等结尾的名词，    在词尾加-es构成复数形式。 boxes class classes watch watches brush brushes s x sh ch 2. bus buses foxes fox (狐狸) dish (盘子) dishes 3. 以“辅音字母+y”结尾的名词，应改y为i，再加-es。 family families comedies comedy (喜剧) y y l d 3. 4. 以“元音字母+y”结尾的名词，直接在词尾加-s构成复数形式 。 boy boys day days o a y y 4. key cities strawberries keys city (城市) strawberry (草莓) 5. 以f或fe结尾的名词，先将f或fe变成v，再加-es构成复数形式。 knife knives half halves “小偷”(thief)的“妻子”(wife)用“刀子”(knife)和 “树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。 5. wives leaves wolves wife (妻子) leaf (树叶) wolf (狼) roof (屋顶) roofs roof “小偷”(thief)的“妻子”(wife)用“刀子”(knife)和“树叶”(leaf) 把“狼”(wolf)劈成两“半”(half)。 巧记： 6. 以o结尾的名词，有的加-s, 有的加-es构成复数形式。 photo photos heroes tomatoes zoos zoo (动物园) tomato (西红柿) hero (英雄) 6. 以o结尾的名词,表示无生命事物的名词，词尾加-s,表示有生命事物的名词，词尾加-es。  加-es的名词有:     potato, tomato, hero 巧记: 　　英雄爱吃    土豆炖西红柿。 Sum up: 1.一般情况下,直接在名词词尾加-s. 2.以s,x,sh,ch结尾的名词,在词尾加-es.   3.以辅音字母加y结尾的名词，要变y为i再加-es.    5.以f或 fe结尾的名词，先将f或 fe变为v,再加-es. 6.以o结尾的名词,表示无生命事物的名词加-s,   表示有生命事物的名词加-es。 4.以“元音字母+y”结尾的名词，直接在词尾加-s . 给下列可数名词加复数．    bird--                   card--              lady--  orange--               ruler--            photo--   friend--                 boy--             watch--   girl--                   case--               cat--             wife--                  tree--              key--                    bed--                  hero--               family-              dictionary--                     question--            leaf--                   party--             cup--  birds ladies oranges rulers cats boys girls cases wives watches trees keys questions beds heroes friends families dictionaries photos cards leaves parties cups this                –       that               – I                     – you               – he / she / it    – am / is           –  these those we you they are  单数                        复数 句子单数变复数 This is a book.         That is an eraser. It is a red apple.  I am a boy. He / She is a teacher. What’s this ?  These are books. Those are erasers. They are red apples. We are boys. They are teachers. What’re these ? 复数句子变单数句子  These are dictionaries. 单数 一般疑问句,并作肯定回答  划线提问            This is a dictionary. Are these dictionaries ?  Yes, they are. What are these ? * * * * 
名词单数变复数专练.ppt