They must be watching the house to see when he was home alone.

He could have been watching the house, for all she knew.

But get the men who are watching the house, and keep them under cover.

I've had my people watching the house for some time now.

He has been watching the house for about three hours.

He was probably watching the house the last two days and saw us getting ready to leave.

But what was she doing here in the middle of the night, watching his house?

Hadn't she watched the house over the last few days?

He's been out there watching the house for weeks now.

I watched the house for an hour or so, too.