上海牛津英语二年级下语法点复习一、be动词(am, is, are)1.am与I连用。例如:I am=Im 我是2.is用于两种情况:(1)单数:例如:There is an apple.(an apple一个苹果,表示单数)(2)不可数:例如:In spring, the grass is green.(grass不可数)3.are用于两种情况:(1)复数:例如:In spring, the trees are green.(trees是复数形式)(2)与you连用:例如:You are=Youre 你是附:I am =Im我是,He is =He s他是,She is =Shes她是,It is =Its它是,We are我们是, You are =Youre你是 / 你们是,They are (他她它) 们是二、What colour.?.什么颜色?1.询问对象,单数用is;复数用are. 如:(1)What colour_is_ the dog?(