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1、Unit3Thisismysister.abookbooksThatisabook.Thisisabook.Thesearebooks.Thosearebooks,too.Thesearemyerasers.Thoseareyourpencilsharpeners.Thisisanorange.Theseareoranges.Thatisherpencil.Thoseareherpencils.Isthathispencilcase?Yes,itis.No,itisn’t.Isthisyourpencil?Aretheseyourkeys?Ye
2、s,theyare.Arethoseherpens?No,theyaren’t.A:Aretheseyour……?A:Arethoseyour….?B:Yes,theyare.B:No,theyaren’t.be动词表示“是”，有三个：am,is,are.我（I）用(am),你(you)用(are),is连着他(he)、她(she)、它(it),单数跟is后，复数全部都用are.单数复数thisthatis/amthesethoseare变为疑问句：1.Thisismyclock.2.Thatisyourring.3.Theseareherbo
3、oks.4.Thosearehisoranges.5.Thosearemybackpacks.Isthisyourclock?Isthatyourring?Aretheseherbooks?Arethosehisoranges?改错：1.Arethisyourbook?2.Thoseismypen.3.Isthesehispencils?4.Arethoseherruler?Isthisyourbook?/Aretheseyourbooks?Thatismypen./Thosearemypens.Arethesehispencils?Areth
4、oseherrulers?Arethoseyourbackpacks?5.Aretheyyourbooks?Yes,they’re.Aretheyyourbooks?Yes,theyare.1.一般直接加s，如pen—pens,eraser—erasers,book—books.2.以o.s.x.sh.ch.结尾的加es,如watch---watches.3.以辅音字母加y结尾的，变y为i再加es,如family---families,dictionary--dictionaries.4.以f或fe结尾的变f或fe为v再加es，如knife(小
5、刀)—knives.5.部分以“o”结尾加es如potatoes(土豆）tomatoes（西红柿）其他加s,如photo--photos可数名词复数：把下列单数名词变成复数：pencilbaseballgamenotebookringrulerpencilsbaseballsgamesnotebooksringsrulerswatchfishbusboxpotatotomatoWatchesfishesbusesboxespotatoestomatoesfamilybabypartyfamiliesbabiespartiesboyclasskn
6、ifelifedictionaryphotoboysclasseskniveslivesdictionariesphotos把下列句子单数变成复数：1.Thisisabook.2.Thatisanorange.3.Thisismypencil.4.Thatisherquilt.5.Isthisyourwatch?6.Isthathisdictionary?7.Itismymap.8.That’shisring.Thisarebooks.Thoseareoranges.Thesearequilts.Thoseareherquilts.Arethe
7、seyourwatches?Arethosehisdictionaries?Theyaremaps.Thosearehisrings.人称代词和物主代词：人称代词是经常用做主语的代词，物主代词就是表示所有关系的代词。人称代词：I我you你he他she她it它we我们you你们they他们形容词性物主代词：my我的your你的his他的her她的its它的our我们的your你们的their他们的把下列句子翻译成英语：1.这是他的铅笔。2.那个是你的文具盒吗？3.那些是你们的桔子吗？4.这些不是他们的地图。5.那些是他们的字典吗？6.这些是我们的
8、削笔刀吗？7.那些是她的手表吗？8.它是我们的学校。Thisishispencil.Isthatyourpencilcase?Arethoseyour
