1. Remember to turn off the lights before going to bed
2. We should recycle waste paper
3. His sister is cooking in the kitchen now
4. What about eating dinner at my house tomorrow evening?
5. Where is your brother ?- He is playing the piano in his room
6. What are you doing now ?-I am decorating my house
7. My mother is making a big cake for my birthday tomorrow
8. Mary can't answer the phone because she is having a bath now