1. He has washed his car
2. She has watered her plants
4 They have finished their homework and they are playing in the garden
3 Mum and dad have opened the bedroom window
5 She has seen the film
6 They have visited The British Museum
7 She has washed her hands
8 the Smiths have decided where they'll spend their weekend
9 Margo have been shoped
10 Jack has cooked his supper