1.What are you doing ?
2.I'm singing. Can you sing ?
3.Yes,I can . but I can't sing well . Can you sing well ?
what are you doing
I am singing.
Can you sing a song?
Yes, I can. But I can not sing very well
Can you sing well ?
What are you doing?
I'm singing, can you?
Yes,I can, but I can't sing well. Can you?
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