To begin with, he kept a close watch on who got in.

We will have to keep a very close watch on you,?

I kept a very close watch over the area in question.

I think we're going to have to keep a close watch on them for the next several years.

I think we'll have to keep a pretty close watch from now on.

She said she'd stay at the top and keep watch.

My next step was to keep watch upon the three of you.

I leave one group to light a fire and keep watch.

He told them to go out and keep watch around the house.

Keep watch for others and stop them if they come.