be动词知识点总结及练习题1.如果主语是第一人称I(我)时,be动词用am。如:Iamastudent.我是一名学生。Iam还可缩写成I'm。如:I'mDavid.我...
be动词一般现在时用法专项练习一、单项选择1.There________manytreesinfrontofmyhousenow.A.isB.areC.wasD.were2.Alotofforeigners______fa...