~ざるを得ない (have no choice but to)

I sympathize with my father, who has to work on Sundays.

We have no choice but to protest against injustice.

I couldn't help but admire the beautiful sunset.

She couldn't help but realize that health is important.

She has no choice but to give up smoking.

She had no choice but to marry the old man.

Because of illness, he had no choice but to postpone the meeting.

The ice had gotten soft, so we had no choice but to cancel the ice skating event.

She can't help but laugh.