A strange man was walking back and forth on the pavement.
I saw a couple of gringos going down the street this morning.
I saw some people walking across the bridge.
Looking out of the window, I saw a stranger at the doorstep.
I noticed a strange man prowling around.
There is a strange man at the door.
The suspicious stranger prowls the streets of the town
There is a strange man in front of the house.
There is a stranger in front of the house.
There's a man that I don't know in front of the house.
A man appeared from behind the door.
That stranger made me leave the room.
A number of people were browsing in the bookstore.