
so we thought it would be USEFUL...
The Big Bang Theory Season 10, Episode 13

You might find a bit of armor quite USEFUL
Game of Thrones Season 3, Episode 1

It could prove USEFUL for my work.
Game of Thrones Season 5, Episode 2

Useful talent.
Game of Thrones Season 5, Episode 7

It's USEFUL for calculating the number
of atoms in a substance,
The Big Bang Theory Season 9, Episode 10