Present Simple:
+ My cat eats a cake.
- My cat doesn't eat a cake.
? Does my cat eat a cake?
Present Continuous:
+ My cat is eating a cake.
- My cat isn't eating a cake.
? Is my cat eating a cake?
Past Simple:
+ My cat ate a cake.
- My cat didn't eat a cake.
? Did my cat eat a cake?
Present Simple:
+ My cat eats a cake.
- My cat doesn't eat a cake.
? Does my cat eat a cake?
Present Continuous:
+ My cat is eating a cake.
- My cat isn't eating a cake.
? Is my cat eating a cake?
Past Simple:
+ My cat ate a cake.
- My cat didn't eat a cake.
? Did my cat eat a cake?