since

1. hnu; e.g. Charles works hard since he left school = Charles cu sianginn a kai ti lo hnu in rian fak piin a ttuan.
2. hnu cu; e.g. He has been home only once since he went to London = London a kal hnu cu voi khat lawng inn ah a tlung.
3. caah; e.g. Since you feel tired you should rest = Na bat caah naa dinh awk a si.