My umbrella was completely useless in the sudden guerrilla rainstorm.

Honestly, he can't keep a promise.

He doesn't understand the problem at all.

This dictionary is very useful for learning Japanese.

Due to yesterday's downpour, my garden was completely flooded.

He has a wealth of experience in guerrilla warfare.

It started raining all of a sudden.

Suddenly, it started to rain.

He suddenly stood up.

I forgot my umbrella, so I got wet in the rain.