Grammar Study – Must vs Have to

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–This section will cover a broad range of different grammar rules and explanations to help you understand sentence structure and improve awareness of English grammar.
このコーナーでは文法の規則や英文の構成についてわかりやすく学べます。
How to use "must" vs " do not have to" in expressing obligation.
Check your understanding by selecting the correct answer below:　
Read each of the following of sentences and select the best answer. Print out this lesson plan and ask your teacher to assist you in understanding the grammar rules.
Note: Must not = Mustn’t – Do not = Don’t
 
1 You (must not / don’t have to) smoke here since there are children nearby.
2 My parent’s are very lenient. I (mustn’t / don’t have to) ask permission to stay out late.
3 Parking bikes in front of the station is prohibited therefore you (mustn’t / don’t have to) do so.
4 Passengers (mustn’t / don’t have to) speak to the driver while they are driving.
5 It has rained a lot, so we (mustn’t / don’t have to) water the garden.
6 You (mustn’t / don’t have to) knock before coming into my office.
7 You (mustn’t / don’t have to) disturb your sister while she’s studying.
8 Japanese citizens (mustn’t / don’t have to) get a visa when travelling to China.
9 Residents (mustn’t / don’t have to) hang clothes outside to dry on their balcony.
10 As tomorrow is a public holiday, I (mustn’t / don’t have to) go to work.
   
1. must not 2. don’t have to 3. mustn’t 4. mustn’t 5. don’t have to 6. don’t have to 7. mustn’t 8. don’t have to 9. mustn’t 10. don’t have to
Moderate level exercises:
Read each of the following of sentences and select which of the choices best fits. Print out this lesson plan and ask your teacher to assist you in understanding the grammar rules.
 
must / have to/ has to must not don’t have to doesn’t have to didn’t have to
1 Oh my god, it’s already 11:30! I _________ go if I want to make it for the last train.
2 Tomoko _________ take the exam last week because she took it already.
3 In the U.S., children _________ attend school until at least the age of 16.
4 I’m taking a day off tomorrow so I _________ wake up early.
5 Hiromi’s husband is extremely rich so she _________ work at all.
6 I got the new Ipad using Softbank’s promotion so I _________ pay anything up front.
7 Parking is prohibited here so you _________ park your car here.
8 Paul really likes his new job because he _________ work late.
9 Tomorrow is Samantha’s birthday. I really _________ buy her a present really soon!
10 You _________ wake him up. He is dead tired and needs to rest.
   
1. have to/must 2. didn’t have to 3. must/have to 4. don’t have to 5. doesn’t have to 6. didn’t have to 7. must not 8. doesn’t have to 9. must/have to 10. mustn’t/must not
Difficult level exercises:
Read each of the following sentences and use the correct form (past/present/negative) of "must" or "have to" + one of these verbs to complete the sentences:
go dress fix pay send
take leave wait schedule cancel
         
1 The car park is free – you _______________ to park your car here.
The car park is free – you don’t have to pay to park your car here.
 
2 I went to the bank this morning. There were few people so I _______________ very long.
I went to the bank this morning. There were few people so I didn’t have to wait very long.
 
3 I don’t think you _______________ for the airport just yet. The flight won’t depart until late in the evening.
I don’t think you have to leave for the airport just yet. The flight won’t depart until late in the evening.
 
4 You _______________ anything from the store unless you pay for it first.
You mustn’t take anything from the store unless you pay for it first.
 
5 Jack left before the end of the meeting because he _______________ home early.
Jack left before the end of the meeting because he had to go home early.
 
6 As my computer broke down last night, I _______________ it back to the manufacturer for repairs later today..
As my computer broke down last night, I (must/have to) send it back to the manufacturer for repairs later today.
 
7 You _______________an appointment to see a doctor if it is an emergency.
You don’t have to schedule an appointment to see a doctor if it is an emergency.
 
8 In order to avoid penalty charges, hotel guests _______________ their reservation(s) 72 hours prior to the hotel check in date.
In order to avoid penalty charges, hotel guests (must/have to) cancel their reservation(s) 72 hours prior to the hotel check in date.
 
9 Our office supplies department just decided to order a new printer so we _______________ the broken printer that we now have.
Our office supplies department just decided to order a new printer so we don’t have to fix the broken printer that we now have.
 
10 The banquet is a black tie event so you _______________ inappropriately.
The banquet is a black tie event so you mustn’t dress inappropriately.
 
 

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