The rainfall that suddenly started and stopped made me realize that I didn't have an umbrella.

When I look outside, it's raining.

I found a sea hare at the beach.

He realized his mistake too late.

He became aware of his mistake.

The trees in the park are flourishing and very beautiful.

It started raining all of a sudden.

Suddenly, it started to rain.

He suddenly stood up.

He came to Japan for the first time.