含义:表示现在正在进行或一段时间正在进行的动作标志词:now, look, listen 等
构成: be +V-ing 现在进行时的含义与构成He is reading a book
V-ing 变化规则:1 )一般加 ing
如 : play----playing watch----watching2)以不发音的 e 结尾 , 去 e 加 ing
如 : take----taking come---coming3)元 + 辅结尾 , 且是重读闭音节的单词 ,双写辅音字母 +ing
如 :run----running swim----swimming 练习1
写出下列动词的 ing 形式
help_________ 2
come_________3
swim_________ 4
eat__________5
give________ 6
find_______7
sit ________ 8
write________ What is he doing
He is playing basketball
What is the boy doing
He is singing
---Is the woman writing
----No, she isn’t
She is reading a book
----What’re they doing
----They’re swimming
----Are they swimming
----Yes, they are
---Are they singing
---No, they aren’t
They aren’t singing
They are dancing
Are they ____a book
No, they ____
____ are they______