Make the sentences negative.

Here are the negative forms of the sentences: 1. Children have not been playing in the park. 2. My dog has not been running all day. 3. This artist has not been drawing since 2011. 4. Derek has not been writing a new book. 5. The chef has not been cooking all day. 6. Scientists have not been doing the researches the whole month. 7. The doctor has not been helping patients all morning. 8. We have not been travelling for 20 days. 9. She has not been wearing this dress since Friday. 10. I have not been listening to music all day. 11. They have not been watching movies all evening.