He walked down the street whistling cheerfully.

He whistled as he went along.

He blushed when the girls whistled at him in the street.

He whistled for his dog.

He drove his car, whistling merrily.

He began to whistle a tune.

I heard someone whistle.

A whistle involves blowing out of your mouth in a certain way.

Jim drove his car, whistling merrily.

My sister was whistling merrily.

I heard someone whistle.

Mary whistled.

Tom kept whistling.

Do you know how to whistle?

Do you know how to whistle?

Mary whistled.

Tom whistled.

Tom can't whistle.