Are you reading? - Yes, I am.
Do you read English books? - Yes, I do.
Are you doing your homework? - Yes, I am.
Do you do your homework? - Yes, I do.
Is she cooking fish? - Yes, she is.
Does she cook every day? - Yes, she does.
Is it sleeping? - Yes, it is.
Does it sleep in the basket? - Yes, it does.
Do they write dictations? - Yes, they do.
Are the writting a dictation? - Yes, they are.
Am I sitting on your chair? - Yes, you are.
Am I speaking to Mr Brown? - Yes, you are.
Do you know Mr Brown? - Yes, I am.
Do you like his books? - Yes, I am.
Do you want to speak to him? - Yes, I am.