can someone help me to learn punjabi?

[Obama]

salaam

if i follow this example : I DIDNT UNDERSTAND = mainu samajh nai ayee

I UNDERSTAND = main samajh gaya (if female then 'gayee)'

so when we say here : I DONT KNOW = mainu nai patta

so i know : main patta

right ?

but here u said :

I LIKE IT = mainu passand ae

I DONT LIKE IT = mainu nai passand/ mainu nai achha

why we say MAINU PASSAND AE : I LIKE IT

why we dont say : MAIN PASSAND AE what is diffrence between : main and mainu ?

thanks

main = pronoun

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mainu = possessive pronoun