Advice, Obligation or Prohibition | Baamboozle - Baamboozle

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Complete the sentence: You _____ clean your bedroom son!

have to

What's the difference? You don't have to walk the dog. You mustn't walk this dog.

don't have to - you're not committed to the obligation / mustn't - prohibition

Complete the sentence: You ______ smoke here!

mustn't

Re-write the sentence: It's prohibited to use a cell phone here.

You mustn't use a cell phone here

What's the difference? You should see a doctor. vs You must see a doctor

Should - Advice / Must - Strong Advice

Complete the sentence: You ______ be seventeen to drive a car in the UK.

have to

What's the difference? You don't have to go shopping. You mustn't go shopping.

don't have to - you're not committed to the obligation / mustn't - prohibition

Complete the sentence: you _____ use your mobile phone during an exam.

mustn't

Complete the sentence: you _____ always get enough sleep before driving a car.

should / must

Complete the sentence: I think I ______ clean my bedroom.

must

Re-write the sentence: It's my obligation to do my homework

I have to do my homework

Which modal verbs or expressions do we use to talk about Obligation?

Have to and Must

Which modal verbs do we use to give advice?

Should and Must

What's the difference? I have to get up earlier tomorrow because..... I must get up earlier tomorrow.

Have to - external obligation / Must - Internal obligation

Complete the sentence: you ______ talk to her, she's your best friend.

should

Re-write the sentence: It's prohibited to enter here.

You mustn't enter here.

Re-write the sentence: It's my obligation to be at work at 8 a.m.

I have to be at work at 8 a.m.

What's the difference? You should buy it, it's very nice. / You must buy it now, she really need it.

Should - Advice / Must - Strong Advice

Complete the sentence: you ______ show your passport or identity card to get on a plane.

have to