Janet / leave her book at home. (+)
Janet has left her book at home.
My girlfriend / call me today (-)
My girlfriend hasn't called me today.
My boy friend / wear his new shirt (-)
My boyfriend hasn't worn his new shirt.
They / do their homework (-)
They haven't done their homework.
You / speak to your boss (?)
Have you spoken to your boss?
I / forget your name. (+)
I've forgotten your name.
Your brother / work in New York (?)
Has your brother work in New York?
The children / eat all the cookies (?)
Have the children eaten all the cookies?
The train / leave the train station (+)
The train has left the train station.