一Be 动词专项练习1. be动词的现在式有三种形式,即:am, is, are(翻译为“是”) 1) be 动词口诀:be 动词三朵花,am,is, are,I 用am,you用are,is 跟着他(he),她(she)它(it),单数is,复数are,不可数用is就对啦!含be动词的缩写形式I am = Im 我是 he is = hes we are=were 我们是you are = youre你是 she is = shes you are = youre 你们是 it is = its they are=theyre 他们是 例: Im Alice. 我是Alice.Orange juice is very good. 橙汁是非常好的。(橙汁不可数,英文中规定液体的东西不可数)Li Daming and Bob are studetns. 是学生二代词人称代词(主格