Did you hear that pig grunting?

Pigs grunt.

The piglet is grunting.

The pig grunts.

I grunted.

How'd your project go?" "I did all the grunt work, yet my group still managed to get a 'C'."

The sentence was primitive, scraping its knuckles on the floor and grunting with heavy threats.

The boar is grunting.

In the evening I went out on safari again, at night I fell asleep hearing the grunting of the hippos.

He grunted his thanks.