Tom, look at your shoes. How dirty they are! You must clean them.
Oh, mum, but I cleaned them only yesterday.
They are dirty now. You must clean them again.
I do not want to clean them today. Even if I clean them today, they will get dirty again tomorrow.
All right, then.
Mum, give me something to eat, please.
You had your breakfast in the morning, Tom, and you had lunch at school.
I am hungry again.