Examples:

• I haven't eaten since breakfast. I'm hungry.
• I'm hungry because I haven't had lunch.
• I'm eating fruits because I'm hungry.
• Now I eat whenever I'm hungry, and I've lost 10 pounds.
• I'm hungry because I haven't eaten.
• I'm hungry and thirsty.
• I eat only when I'm hungry.
• It is 12 o'clock and I'm hungry. What's for lunch?