1. These shoes are black.
2. these shoes are gray.
3. this pen is small.
4. this pen is very large.
5. the time on that clock is 5:00.
6. the time on that clock is 11:50.
7. this plane is a toy.
8. this plane isn't a toy.
9. this cat is eating.
10. this cat isn't eating.
11. these glasses are for reading.
12. these glasses are sunglasses.