Thinking about "se, ka, ki, tha, thi, ko, hai, hoon, kar, ne"

Main aap ko intezar kar rahi hoon
Teri bivi meri dost hai
Teri bivi se meri dosti hogi
Meri bivi ka naam Rita hai

1- Main ap ko interzar kar rahi hoon = I am waiting for you

the verb is (intezar kar-na) - when it is used in a continous action we eleminate -na, so we ende up with (intezar kar).

2- teri bevi meri dost hai = your wife (is) my friend

3- teri bevi (se) meri dost hoga-yee = your wife became my friend (became friend with me)

4- meri bevi (ka) naam Rita hai = my wife's name is Rita

here we used (ka) because naam is masculine

got it ? :)