bpai nǎi maa = Where have you been?
“maa”– is usually means..to come.. but when it’s located at the end of the sentence, That’s sentence becomes past tense sentence.
bpai nǎi maa = Where have you been?
Watch this video for an example:
Wife: bpai nai maa (where have you been?)
husband: Bpra-chum ( (I had) meeting.)
Wife: laew bpai (Okay(over) then)
* laew bpai — be over; be ended; be bygone
laew bpai– is the answer which is an expression of the relieved feeling from trying to caught somebody mistage.