'hay' use for single things but 'hain' use for more than one things

if want to show relation with one thing then we will use HAI and if we want to show relation ship with more than one thing then we will use HAIN .....

You are absolutely right. Always use "Meri" for female subject. and "Mera" for male subject. The meaning of "Meri" and "Mera" is same, that is "Mine" for more than two people u can use "Hamara" (additional information) Hope the answer to the question.

HI, Urdu is my native language and I teach my students. Don't confuse 1. Mera / Meri /Mary are matter to Noun 2. if the noun is Singular + Masculine, we will use " Mera" 3. if the noun is Plural + Masculine, we will use " Mary" 4. if the noun is Feminine we will use " Meri" no matter noun is Singular or Plural. You can join us at Facebook. as Urdu Academy Jakarta

mera - for things which are masculine in gender. e.g mera ghar (because ghar is m word) mera college.(my college, college is masculine in hindi-urdu) meri for femenine things e.g. meri kitaab meri gaadi meri cycle etc.