1.) Has the plane landed yet?
2.) She has been working for this company since last year.
3. They have been friends since they were children.
4.) We can't go shopping because the shops have been closed for the day.
5.) Have Jake and Carl practised the guitar?
6.) Sally has not cleaned her room for an hour, just thirty minutes.
7.) The storms have damaged many houses in the neighbourhood.
8.) My brother is very tired. He has been training for the race all month.
