It's my feeling

ลำดับตอนที่ #2 : still

Are you still ..at home / @wse ?  <<---- In true life, People like to say this one.

Do you stay @ wse?

Do you still stay @ wse?

All of this It's correct

Ps. still can be verb, noun, adv, and adj. 

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But you can't say " Are you stay...."

because, 

Are use with Noun 

Do use with Verb

and stay, It's a verb, so "Are you stay" it's incorrect!!