If we can use air as fuel, why think about using anything else?

"Before anyone takes out a card they should think about how they'll be using it," she said.

What do you think about using Google to check up on another person?

When did you start thinking about using those experiences in your fiction?

I had an idea he was thinking about using it.

Maybe I'm saying you should think about using all the resources available.

I've been thinking about using it to power a ship.

"I never thought about using live animals in my work before," he said.

Then he thought again about using the gun that way but it did not seem so bad.

That is a capability we need to think about using.