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Let’s sing：
What are you doing? What are you doing?
I am running. I am running.
What’s she doing? What’s she doing?
She is singing. She is singing.
What are they doing? What are they doing?
They are swimming. They are swimming.
What’s he doing? What’s he doing?
He is jumping. He is jumping.
现在进行时
The Present Continuous Tense
注：1.be 和动词-ing二者缺一不可，其中be随着前面的主语人称数的变化而变化。
2.常用的提示词：now.Look.Listen。
一、概念：
现在进行时表示现在正在进行或发生的动作。
二、现在进行时的基本结构
be(am,is,are) + 动词-ing
例如; I am playing basketball.
Amy is writing a letter to her mother.
They are swimming in the sea.
三.动词-ing的加法
一、直接加-ing：
rain---raining watch---watching eat---eating
clean---cleaning sing---singing walk---walking
二、末尾去“e”加-ing ：
make---making take---taking write---writing
dance---dancing drive---driving ride---riding
come---coming skate---skating
三、末尾字母双写加-ing ：
swim---swimming run---running sit---sitting