antan (in English)?

antan, etan, pandan→  while

Antan l'ap lapriyè, li tonbe kriye.
While she was praying, she started crying.

Antan y'ap pale konsa, polis la parèt sou yo.
While they were talking, the police came to them.

Antan ou tou deyò a, pa pito ou pase achte yon galon lèt pou mwen.
While you're out, why don't you buy me a gallon of milk.

Antan nou la a, pa pito nou koumanse travay.
While we here, why don't we start working.