It's Monday morning, and you're sitting in your desk in English class. The teacher is talking about grammar, but it's not very interesting. You haven't eaten anything today, and you are starving. You want to find some food.
Suddenly, you hear your name. You look up, and the teacher is standing in front of you. He asks you a question:
"Which of the following sentences is right:I have eat, I have eaten, or I eating?"