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1、新概念英语第一册Lesson17-18Themoneyis___（mine,my）Sheis___(his,he)sister.Ilike___(their,they)shoes.I’m___(your,yours)teacher.Thechildis___(her,hers).Theclassroomis___(our,ours)Thehomeworkare___(your,yours).可数名词单数形式变复数的变化规则1.一般直接加sbook(s);boy(s)2.以“s,x,sh,ch”结尾，加esbus→buses；box→boxe
2、sbrush→brushes；watch→watches3.以o结尾，加s，特殊：黑人英雄爱吃西红柿和土豆Negroes,heroes,tomatoes,potatoes4.以辅音字母+y结尾，变y为i再加esfamily-families5.以元音字母加y结尾，或专有名词以y结尾的，加sboy-boys;Henry-Henrys 6.以f,fe结尾，变f,fe为v再加esleaf-leaves,knife-knives; 7.不规则变化foot-feetgoose-geesetooth–teethman-menwoman-womenchi
3、ld-childrenox-oxenfishsheepdeerChineseJapanese不规则变化要特别记，oo常常变ee，foot-feet是一例； 男人、女人a改e，woman-women是一例；child复数children，中、日、鹿、绵羊无变化， 单数、复数是一家8、合成名词，将主体词变为复数形式passer-bypassers-by sister-in-lawsisters-in-law 9、由man和woman构成的合成名词，两个构成部分都要变成复数manworker——menworkerswomandoctor——wom
4、endoctors10、有些名词只有单数形式advice（劝告，忠告）luggage（行李）11、有些名词只有复数形式clothes,goods,scissors,pants,trousersWriteintheirregularpulralsofthesenouns：manwomanpostmanpolicewomanchildfoottooth---------men---------women---------postmen---------policewomen---------children---------feet------
5、---teeth二.单数句变复数句1.变化规则this–thesethat–thoseis–are名词单数变复数2.eg:Thisisabook.Thatisanumbrella.Thesearebooks.ThoseareumbrellasLesson17Howdoyoudo?Lesson18Whataretheirjobs?Howdoyoudo?Howdoyoudo?Unit17salesrepemployeeofficeassistanthard-workingmanGametimeemployeeofficehard-working
6、mansalesrepsassistantWordsExplanation!employv.雇佣employern.雇主employeen.雇员Comeandmeetouremployees.来见见我们的雇员．一个动词后有-ee，是被这个动作影响的人一个动词后有-er，是做出这个动作的人Heismyemployer.=Heismyboss.employeeemployeremployTherockishard.Thisisahardwork.Heworkshard.坚硬的困难的猛烈地It’sraininghard.努力地hard-worki
7、ngadj.勤勉的,努力工作的hard努力地Theyworkveryhard.他们工作很努力。=Theyareveryhard-working.他是一名勤勉的雇员。Heisahard-workingemployee.salesreps推销员Hesellsclothes.他卖衣服。Iwanttobuyabicycle.我想买一辆自行车。sell-----buysellv.卖，售n.卖，出售;廉价出售onsale贱卖，大减价Theclothesareonsale.衣服大减价saleassistantn.助手helpv.帮助assistv.帮助，
8、援助assist+anthelpsb.(to)dosth.helpsb.withsth.I’msorryIcannothelp___thework.AtofinishBfinis
