1. He wasn't in the fifth form last year
2. They weren't busy last Friday
3. You can't take the dictionary
4. They couldn't spend their holidays in the country
5. She will not enjoy the party
6. It isn't hot today
7. I don't wear a school uniform
8. The lesson doesn't last fifty minutes
9. She doesn't study two foreign languages
10. They didn't spend a lot of time there