I want you to go up there and keep a lookout.
"You can get back to the outside door, and keep lookout along the hall."
And send a couple of your boys up here to keep a lookout.
Fine, so all you need to do is keep a sharp lookout.
"Keep a lookout and tell me if you see any cars that seem to be following us."
Have them back before dark, and keep a sharp lookout.
You get to the house and keep a sharp lookout.
Keep a sharp lookout for the next hour to the east.
Everyone needs to keep a sharp lookout in case they come back.
We'd kept a steady lookout, but so far no one seemed to be after us.