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They are having science class.
What are they doing?
What is Chen Jie doing?
She is eating lunch.
What is Chen Jie doing?
She is reading a book.
What is Chen Jie doing?
She is listening to music.
doing morning exercises
having English class
eating lunch
reading a book
listening to music
The rules
eat ---eating listen---listening do---doing read ---reading
1 在动词后直接加ing
2 以不发音的e结尾，去e加ing
have---having dance----dancing take---taking
3 重读闭音节，以辅音字母结尾，双写最后一个字母加ing
run---running swim---swimming
clean
play
go
pick
have
take
hit
swim
run
jump