Fill in the blanks with MUST, MUSTN'T, or CAN'T. Dad: Look at those monkeys! They're so funny! Son: Can I give them my banana? Dad: No, you ____ feed them! Zoo food is special. Son: But why? Dad: Human food can't be good for them. And you ____ always follow the rules. Zookeeper: Excuse me, sir, you ____ tap on the glass. It's forbidden. Visitor: Oh, sorry! I just wanted the parrot to look at me. Zookeeper: Loud noises ____ be allowed here - birds get stressed easily. Visitor: I understand. I ____ be more careful. Girl: Dad, ____ I throw bread to the penguins? Dad: No! You ____ throw anything - it pollutes the water. Girl: But they look hungry! Dad: The zookeepers feed them. We ____ just watch and take photos. Mom: Look at the tigers! But remember, you ____ run towards the cage. Child: I know, I ____ stay behind the line. Can I give them my sandwich? Mom: No, you ____ feed them! It's dangerous.

Zoo Conversations

Instructions: Fill in the blanks with MUST, MUSTN'T, or CAN'T.

• Dad: No, you MUSTN'T feed them! Zoo food is special.
• Dad: Human food can't be good for them. And you MUST always follow the rules.
• Zookeeper: Excuse me, sir, you CAN'T tap on the glass. It's forbidden.
• Zookeeper: Loud noises MUSTN'T be allowed here - birds get stressed easily.
• Visitor: I understand. I MUST be more careful.
• Girl: Dad, CAN I throw bread to the penguins?
• Dad: No! You MUSTN'T throw anything - it pollutes the water.
• Dad: The zookeepers feed them. We MUST just watch and take photos.
• Mom: Look at the tigers! But remember, you MUSTN'T run towards the cage.
• Child: I know, I MUST stay behind the line. Can I give them my sandwich?
• Mom: No, you MUSTN'T feed them! It's dangerous.

Explanation:

• MUSTN'T is used for prohibitions (things that are forbidden or not allowed).
• MUST is used for rules that must be followed or for strong recommendations.
• CAN'T is used for things that are not possible or not permitted.
• CAN is used to ask for permission.