微课件---现在进行时.pptx

文档介绍：I’m Watching TV.
现 在 进 行 时
I amareading a book.
What are you doing?
I am doing my homework.
What are you doing now?
What is he doing?
He is cleaning
the house.
What is he doing?
He is eating
some meat.
They are singing.
What are they doing?
Meaning
概念
现在进行时表示正在进行或发生的动作，也可表示当前一段时间内的活动或现阶段正在进行的动作。
常与look、now、listen 连用。
Look,the boy is reading a book.
Structure
句型结构
肯定形式：
主语 + be + doing + 其他成分
What’s the bird doing?
It is singing.
否定形式：
主语 + be + not + doing +其他成分
The boy isn’t reading
a book now.