可数名词及其单复数课件2022-2023学年外研版七年级上册英语

外研版 初中英语 七年级上 可数名词及其单复数 仙华外国语学校 崔佳佳 1 A countable noun refers to something we can count. 可数名词 a countable noun a singular form 单数形式 plural forms 复数形式 可数名词 a banana an egg a tomato a key singular forms 单数形式 We use a, an or one before a singular noun. If the noun starts with a vowel sound(元音音素)，we use an. eg. I have a banana and an egg for breakfast. /eg/ five bananas ten eggs three keys four tomatoes plural forms 复数形式 When the number before a countable noun is more than one(大于1), we must use plural forms. eg. There are ten eggs in the basket. 1. 一般情况下，直接在词尾加-s构成复数形式。 浊辅音和元音后读[z]清辅音后读[s] 　 map- book- bag- car- maps books bags cars How to change singular forms into plural forms? 2. 以s, sh, ch,x 等结尾的词 加 –es，读作/iz/ 　 bus- brush- box- buses brushes boxes 3. 以辅音字母+y结尾 变y为i再加es　 　　 baby--- babies family story city baby families stories cities babies monkey--- key---keys boy---boys toy—toys day---days 钥匙 男孩 玩具 天 4. 以元音字母+y加s　 　　 monkeys 5. 以f 或 fe 结尾变f, fe 为v加es的单词有： 如： half---　 knife---　 leaf---　 wolf--- life---　 thief--- halves　 knives wolves lives thieves leaves some tomatoes some potatoes some heroes 初中阶段以o结尾的名词复数主要是加- s,只有这几个加- es: Heroes love tomatoes and potatoes. 6. 以o 结尾 feet tooth -- 名词复数的不规则变化(1) 元音字母变为e oo---ee foot teeth a---e -- men -- women men doctors women teachers man woman child - mouse -- 名词复数的不规则变化(2) children mice one sheep 一只羊 two sheep 两只羊 名词复数的不规则变化(3):单复数形式相同 several deer one deer one fish 一条鱼 three fish 三条鱼 a Chinese a Japanese some Japanese 1.How many (radioes, radios) can you see? 2.There are 36 (boys, boies) in my class. 3.Look at those (sheeps, sheep). 4.I don't want (a, an) old cup. 5.Give me that (box, boxes), please. Have a try 16 1． Look at those