Choose all the sentences which are grammatically correct.

• We have been playing chess all morning. Can we do something else now?
• Hurry up! Our train will leave in half an hour!
• Can you be a little quiet, please? The baby sleeps.
• If the weather will be favourable tomorrow, we will go camping.
• Lin played in her tree house, when her mum called her for lunch.
• Mary lives in Hollywood, but she has never met a celebrity.
• Tom believes that the house down the street is haunted.
• Jenny loved the pet parrot her sister gave her for her birthday last month.