Could you use tumhare instead of aapke?
Yes you can use "tumhare" instead of "aapke" appke used for, to ask in polite way to give respect
Tumhare is for younger ones than you, and aap is for elders to pay respect
That's what I came here to ask!
It accepted तुम्हारे for me (6/21).
तुम्हारे जूते कहाँ है is it wrong?
हैं for plural
Joota nahi hai.... Joote hai.... Plural hai... To ye hona Chahiye