[終「お」]わる => To finish A; A ends N4
Secondary Verb
[始「はじ」]める => To begin to A; A begins N4
Secondary Verb
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
[一方「いっぽう」] => On one hand A, on the other, B; Although A, at the same time, B N2
Contrast,Surprise