Present Simple, Present Continuous, Present Perfect, Present Perfect Continuous

We ..... the conference since nine o'clock.

They ..... along the beach now.

My friend ..... around the town for half and hour.

Fred often ..... at half past seven in the morning.

My grandparents ..... for the tickets yet.

Sally ..... her yet.

Tod ..... the letters since 5 o'clock.

Ben and Mark are good friends. They ..... each other since childhood.

Helen is very clever. She ..... three languages.

Sarah is very busy. She ..... things for our trip since 6 o'clock.

Ann and Jane can't play with you. Ann ..... the furniture for half an hour now, and Jane ..... vacuuming the carpets.

The boss is in his study. He ..... a report of the manager.