What is the weather like,It is raining. It is rainy,It is snowing. It is snowy,It is windy,It is warm,What is the weather like,It is cold,It is sunny,It is hot,It is cloudy,What is the weather like today,Its sunny,shine,The sun is shining,shining,The sun is shining,Im reading a book,They are swimming,同学们，你们发现上面三个句子 什么特点吗,be,动词ing,am,is,are,表示正在发生的动作或发生的事情，通常与now连用,现在进行时态： 基本形式,Be动词的变化形式,Be 动词分为三种形式，is/am/are. I 用 am，you 用are，is跟着he/she/it,要问复数(we/they/you)用什么，全部都用一个are,照例子，写出下列动词的-ing形式,look-loo
