一般现在时中be动词的使用be动词的种类be动词包括“am”,“is”,“are”三种形式。第一人称单数(I)配合am来用。句型解析析:Iam+…IamLily.Iamtenyearsold.Iamaboy.be动词的种类第二人称(You)配合are使用。句型解析:Youare+…Youaremygoodfriend.Youareagoodperson.Youarebeautiful.be动词的种类第三人称单数(HeorSheorIt)配合is使用。句型解析:She(He,It)is+…Sheisagoodgirl.Sheissocute.Sheistender.be动词的种类人称复数(we/you/they)配合are使用。句型解析:We(You,They)are+…WeareinClass5,Grade7.Theyaremyfriends.Youaregoodstudents.综合解析当使用be动词的时候,前面请先加上第几人称。be动词前面的人称,是不可随意替换的。例如:Iam,Youare,Sheis,并不会出现Iis,Youam,Sheare这样的情形。Be动词的人称变化口诀:I(我)用am;you(你)用are,is连着he(他),she(她),it(它);单数名词用is,复数名词全用are。rfrefmjmbe动词的疑问句1、Heisateacher.be动词提句首Isheateacher?2、Theyaretwins.Aretheytwins?Iamagoodstudent.练一练AmIagoodstudent?rfrefmjmbe动词的否定句1.Heisateacher.Heisnotateacher.2.Theyaretwins.变否定,be动词后加notTheyarenottwins.Iamagoodstudent.练一练Iamnotagoodstudent.rfrefmjmBe的用法口诀变疑问,往前提,句末问号莫丢弃。变否定,更容易,be后not莫忘记。疑问否定任你变,句首大写莫迟疑rfrefmjmbe动词的缩写It’sSheisThey’reWeareShe’sIamHe’sTheyareWe’reHeisI’mItisrfrefmjm改错:1.Iareverygood.2.Theyisstrong.3.Heareold.4.Sheamslim.5.Itarelovely.amareisisis把下列句子改为一般疑问句2.WearefromBeijing.3.Herfatherandhermotherareteacher.Areyoutwenty-nine?AreyoufromBeijing?Areherfatherandhermotherteacher?1.Iamtwenty-nine.把下列句子改为否定句3.SheisfromBeijing.4.Herfatherandmotherareteachers.Sheisn'tfromBeijing.1.Iamtwenty-nine.Iamnottwenty-nine.Herfatherandmotheraren'tteachers.Nevertooldtolearn.活到老,学到老。