Category 1 Have To or Must?
Complete the sentence:
“Chefs ______ wash their hands before cooking.”
Answer: have to / must
You ______ touch a firefighter's equipment without permission. It isn't allowed.
Answer: mustn’t / must not
Complete the sentence:
“Dentists must be careful ______ they work with people's teeth.”
Answer: because
I work with animals. I help them when they are sick.
Answer: Veterinarian / Vet
Your friend asks:
“Can I come with you?”
You want to say yes. What can you say?
Example answer: “Yes, of course!” / "Sure"
Which sentence is correct?
A) “Firefighters must wears special clothes.”
B) “Firefighters must wear special clothes.”
C) “Firefighters must to wear special clothes.”
Answer: B
A chef is making lunch, but they ______ cook dessert today. It isn't necessary.
Answer: don’t have to
Why do firefighters have to wear special clothes?
Example answer: “Because they have to protect themselves from fire.”
I make food for people. I work in a kitchen.
Answer: Chef / Cook
Your friend asks why a chef is wearing an apron.
Give an answer using because.
Example answer: “Because the chef has to keep their clothes clean.”
Make a sentence about an astronaut using must and space.
Example answer: “An astronaut must be careful in space.”
What is the difference? (In English)
“Scientists must wear gloves.”
“Scientists mustn’t wear gloves.”
Answer: The first says gloves are necessary. The second says gloves are not allowed.
Complete the dialogue:
“Why does a chef have to wash their hands?”
“Because __________________________.”
Example answer: “Because they have to keep the food clean.”
I fly an airplane and take people to different places.
Answer: Pilot.
Your teacher says:
“What do you want to be when you grow up?.”
What can you say?
Example answer: " I want to be a...” / "When I grow up, I want to be a..."
A veterinarian is treating a sick animal. Which sentence makes sense?
A) “The veterinarian must check the animal.”
B) “The veterinarian must checking the animal.”
C) “The veterinarian must to check the animal.”
Answer: A
A farmer has finished all the work for today. He ______ work tonight.
Answer: doesn’t have to
Which answer makes more sense?
“Why must veterinarians be gentle with animals?”
A) “Because animals can be scared.”
B) “Because animals are made of chocolate.”
Answer: A
I work with fire. I help people when there is a fire or an emergency.
Answer: Firefighter.
You see someone touching a strange animal at the zoo. You know it isn't allowed.
What do you say?
Example answer: “You mustn’t touch the animal!”
Change the sentence using "must" without changing the meaning:
“Pilots have to check the plane before flying.”
Answer: “Pilots must check the plane before flying.”
An astronaut is inside a spacecraft. Someone says:
“You ______ open that door!”
What does the speaker mean?
Answer: mustn't / must not
It is not allowed / It would be dangerous to open it.
Your friend asks:
“Why must astronauts train before going into space?”
Give a complete answer using because and have to/must.
Example answer: “Because they must learn how to work safely in space.”
“I work in a laboratory. I do experiments and try to discover new things. I must be very careful because I work with different materials.”
Answer: Scientist.
You and your friend are going to an airport. Your friend wants to run to the airplane, but you know you have to wait.
What do you say?
(Use "must/have to" and "because".)
Example answer: “We have to wait because we must follow the airport rules.”