Period 3 Grammer Focus-3c,Unit 2 This is my sister.,Grammar Focus 语法焦点,单数,复数,可数名词,如 何 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.,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,2.,3. 以“辅音字母+y”结尾的名词，应改y为i，再加-es。,family,families,comedies,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,4.,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.,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- friend- boy- watch- girl- case- cat- tree- key- bed- family- party- cup-,birds,ladies,oranges,rulers,cats,boys,girls,cases,watches,trees,keys,beds,friends,families,cards,parties,cups,this that he / she / it am / is ,these,those,they,are,单数 复数,指示代词,人称代词,系动词,句型转换 1.Whats this ? 复数,Whatre these ?,2.Hes a Chinese boy. 复数,Theyre Chinese boys.,3. This is a bike. 复数句,These are bikes.,指示代词,系动词,可数名词,注意：单数句子转变为复数句子，指示代词、人称代词、系动词、可数名词都要变化为复数形式。,二、句型转换 1.This is my mother.,1）变否定句 2）变一般疑问句，并作肯定或否定回答,This is not my mother. Is this your mother ? Yes, it is. / No, it isnt.,2.That is a car.,1）变否定句 2）划线提问 3) 变复数句,That is not a car. Whats that? Those are cars.,3a Complete the conversation and practice it with your partner.,A: That _ my family. Thats my mother. B: _ he? A: _ my father. B: Whos _? A: Shes _ sister. B: And _ they? A: _ my grandparents.,is,Whos,Hes,she,my,whore,Theyre,3b Look at the picture. Make sentences with the words in the three boxes.,this that these those,my your,father mother grandfather grandmother parents grandparents brother sister,Is/are,3c Bring some family photos to class. Take turns to ask and answer questions about the photos.,Thank you!,