Someone takes a long time to do something (ka--en).
Kaynamen mwaba pabidyen dyaken binahod mo a libro.
Don't take a long time to return to me the book you borrowed.
Something as the weather, an event, etc., (ma-) is a long time.
Maynam pa Nabidad.
It's a long time still to Christmas.
Naynam danayaw chimpo na maganay.
The weather has been good for a long time.