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结构：be+现在分词(动词-ing)
熊先生正在跳舞。
兔子小姐正在跳跃。
猴子先生正在哭。
I am ...ing...
我正在...
We / They are ...ing ...
He / She/It is ...ing ...
我们/他们正在...
他/她/它正在...
肯定句的基本结构： 主语+be+动词ing…
What is he doing?
What are they doing?
clean the car
clean the table
sweep the floor
wash the dishes
What is he/she doing?
ing
ing
ing
ing
碗、碟
Who ?
Ben
Today is Saturday. Mike’s parents
are busy(忙)with the housework .
Who ?
Today is Saturday. Mike’s parents
are busy(忙)with the housework .