名词单复数变化规则及现在进行时结构

名词单复数变化规则1.一般情况下，词尾直接加s；(books,rooms,days)2.以s,x,ch,sh结尾的名词变复数时，词尾加es；(buses,boxes,watches,dishes)3.以‘辅音字母+y'结尾的，去掉y加ies;(city--cities,body--bodies,factory--factories)4.以单个O结尾的可数名词，有生命个体：加es;(heroes,tomatoes)无生命个体：加s(如radios,pianos).5.以f或fe结尾的名词，将f或fe改为v再加es。（half--halves,leaf--leaves,knife--knives,wife--wives)不规则变化1.男人女人a变e,womanteacher--womenteachers(man--men,woman--women,policeman--policemen)2.鹅足牙oo变ee,(goose--geese,foot--feet,tooth--teeth)3.老鼠虱子也好记，ous变ic,(mouse--mice,louse--lice)4.孩子加上ren(child--children)5.鱼鹿绵阳不用变。(fish--fish,deer--deer,sheep--sheep)Exercise:1.chairapplegrapedesk2.buswatchboxbrush3.photoradiozoo4.tomatopotatohero5.babycityfamilycountry6.boytoy7.thiefshelfwife8.childfootmousewomanmouse9.deersheepfishyuantofuporkChinese10.以s结尾，不可数mathspoliticsphysicsnews11.集体名词，以单数形式出现，但实为复数peoplepolicecattle不能说apeople,apolice,acattle可以说aperson,apoliceman,aheadofcattle动词现在分词：动词原型+ingreading,drinking,eating,meeting,thinking特殊变化：1.以e结尾，去e加ingwriting，making特殊变化：2.重读闭音节要双写结尾的辅音字母加ingsitting，swimmingputting，running特殊变化：4.以ie结尾的动词，把ie改为y，再加ingdie---dyinglie---lyingdo→doingclean→cleaningcook→cookingeat→eatinghelp→helpingwash→washingwatch→watching肯定句变疑问句一提二变三问号一提：提be动词，提情态动词，放助动词二变：I变you，we变you，my变your，our变your，mine变yours，some变any三问号：加？