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Excuse me, do you have…?
How long can I keep it/them?
You must return it/them on time.
Thank you. / Thank you all the same.
Let's sing a song. Are you sleeping?
Guessing game: What are you doing?
A: Where are you?
B: I'm in my bedroom.
A: Are you sleeping?
B: Yes, I am./No, I'm not. Please guess again.
A: What are you doing?
B: I am...
Present Continuous Tense (现在进行时） 现在进行时表示现在（说话瞬间）正在进行或发生的动作。
现在进行时be+V-ing
肯定句：主+be+V-ing+其他
e.g.: We are having a class.
特殊疑问句：What+主+be+V-ing+其他
e.g.: What are you doing?
一般疑问句：be+主+V-ing+其他
e.g.：Are you having a class?
否定句：主+be+not+V-ing+其他
e.g.: We are not/ aren't having a class.
动词 v.-ing的构成形式
Grammar
wash
catch
make
ride
sit
get