for possesion we generally say 'paas' (near) u can also understand 'mere paas' as 'near me'. but it is 'xyz has/have' or 'near xyz' depends on the context. i have - mere paas मेरे पास u have - tumhare paas तुम्हारे पास u have -aapk paas'. आपके पास we have - humare paas हमारे पास they have - unke paas उनके पास I have a dog. mere paas kutta hai. We have no money. humare paas paise nahin hain.( we do not have money) the pattern 'ke paas' and 're paas' u can notice. but sometimes we change the sentences itself like They have difficult jobs. to their jobs are difficult. unke kaam(jobs) mushkil/kathin hain.

one another case i forgot to add, 'i have doubt/problem', 'mujhe doubt/problem hai'. 'ko' form of the word is used.