Mustn’t vs. Don’t have to – English Grammar Exercises for B1
Choose the best option (A, B, C, or D) to complete each sentence. Read the text carefully, as all questions are part of a continuous speech given by a tour guide before entering the main gallery.
“Welcome to the National Art Museum! Before we enter the exhibition, please listen to these important rules.”
1 The artworks here are incredibly fragile, so you ______ touch the paintings under any circumstances.
(a) don’t have to
(b) shouldn’t
(c) mustn’t to
(d) mustn’t
2 You can take photos in this gallery, but you absolutely ______ use a flash, as the bright light damages the old canvas.
(a) don’t have to
(b) mustn’t
(c) don’t must
(d) needn’t
3 We have a free cloakroom near the entrance, so you ______ carry your heavy winter coats around the museum.
(a) don’t have to
(b) mustn’t
(c) haven’t to
(d) couldn’t
4 To protect the museum from pests, visitors ______ bring any food or drinks into the exhibition halls.
(a) mustn’t bringing
(b) shouldn’t
(c) don’t have to
(d) mustn’t
5 You will see a red line painted on the floor in front of the masterpieces. You ______ cross that line!
(a) don’t have to
(b) aren’t supposed
(c) mustn’t
(d) mustn’t to cross
6 Your admission ticket includes all services, which means you ______ pay extra for the audio guide device.
(a) mustn’t
(b) don’t have to
(c) don’t need
(d) won’t
7 If you want to sketch the artworks, you ______ use ink pens; only lead pencils are allowed inside the rooms.
(a) mustn’t
(b) don’t have to
(c) not have to
(d) shouldn’t
8 This is a self-guided tour section, so you ______ stay with the group the entire time. Feel free to explore on your own!
(a) mustn’t
(b) shouldn’t
(c) haven’t to
(d) don’t have to
9 Please be mindful of the glass display cabinets. You ______ lean against them, as the glass might break.
(a) don’t have to
(b) couldn’t
(c) don’t must
(d) mustn’t
10 This is a place of quiet reflection. You ______ speak loudly or shout across the corridors.
(a) don’t have to
(b) mustn’t speaking
(c) mustn’t
(d) needn’t
11 The museum is huge, but you ______ view all the artworks today because your ticket is valid for three days.
(a) mustn’t
(b) don’t have to
(c) aren’t have to
(d) cannot
12 You can keep your small handbag with you, so you ______ leave it at the security desk.
(a) mustn’t
(b) don’t need
(c) shouldn’t
(d) don’t have to
13 We have some ancient sculptures placed in the open center of the room. You ______ touch them, even though they are not behind glass.
(a) don’t have to
(b) mustn’t
(c) mustn’t to touch
(d) wouldn’t
14 The marble floors can be very slippery. Therefore, children ______ run in the hallways.
(a) don’t have to
(b) don’t must
(c) mustn’t
(d) shouldn’t
15 There is a lot of text on the walls, but you ______ read every single information plaque if you are feeling tired.
(a) mustn’t
(b) don’t have to
(c) haven’t to read
(d) won’t
16 For fire safety regulations, visitors ______ block the emergency exits with their strollers or bags.
(a) don’t have to
(b) mustn’t blocking
(c) needn’t
(d) mustn’t
17 The tour finishes at the gift shop, but you ______ buy any souvenirs unless you genuinely want to.
(a) mustn’t
(b) not have to
(c) don’t have to
(d) shouldn’t
18 The floors are designed to be walked on with regular footwear, so you ______ take off your shoes.
(a) mustn’t
(b) don’t have to
(c) haven’t to
(d) wouldn’t
19 We have designated phone areas in the lobby. You ______ use your mobile phone to make calls inside the quiet art zones.
(a) don’t have to
(b) don’t must
(c) shouldn’t
(d) mustn’t
20 Finally, the most important rule: you ______ ignore the instructions given by our security guards at any time.
(a) don’t have to
(b) mustn’t to ignore
(c) mustn’t
(d) shouldn’t
ANSWER KEY & EXPLANATIONS
1 (d) mustn’t
- Why it is correct: Touching fragile paintings is strictly forbidden to protect valuable assets.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake (implies “you don’t need to touch them, but you can,” which will destroy the art). (c) “mustn’t to” is a Structural Error (modals never take “to”). (b) “shouldn’t” is a Meaning Trap (too weak for a strict museum rule).
2 (b) mustn’t
- Why it is correct: Using a flash damages the canvas and is prohibited by the museum.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake. (c) “don’t must” is a Structural Error. (d) “needn’t” is a Meaning Trap (indicates lack of necessity, not a ban).
3 (a) don’t have to
- Why it is correct: The cloakroom provides an alternative, meaning carrying heavy coats is unnecessary. The obligation is removed.
- Distractor Analysis: (b) “mustn’t” is a Common Mistake (it’s not illegal to carry your coat, just inconvenient). (c) “haven’t to” is a Structural Error. (d) “couldn’t” is a Meaning Trap.
4 (d) mustn’t
- Why it is correct: Bringing food attracts pests and ruins art. It is absolutely forbidden.
- Distractor Analysis: (c) “don’t have to” is a Common Mistake. (a) “mustn’t bringing” is a Structural Error (needs bare infinitive). (b) “shouldn’t” is a Meaning Trap.
5 (c) mustn’t
- Why it is correct: Crossing the red line triggers the alarm. It is a strict security boundary.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake. (d) “mustn’t to cross” is a Structural Error. (b) “aren’t supposed” is a Structural Error (needs “to cross”).
6 (b) don’t have to
- Why it is correct: The ticket covers the cost, so paying extra is not required (lack of obligation).
- Distractor Analysis: (a) “mustn’t” is a Common Mistake. (c) “don’t need” is a Structural Error (missing “to”). (d) “won’t” is a Meaning Trap.
7 (a) mustn’t
- Why it is correct: Ink can permanently stain the floor or art, so using pens is strictly banned.
- Distractor Analysis: (b) “don’t have to” is a Common Mistake. (c) “not have to” is a Structural Error. (d) “shouldn’t” is a Meaning Trap.
8 (d) don’t have to
- Why it is correct: Visitors are given the freedom to explore, so staying with the group is optional.
- Distractor Analysis: (a) “mustn’t” is a Common Mistake. (c) “haven’t to” is a Structural Error. (b) “shouldn’t” is a Meaning Trap.
9 (d) mustn’t
- Why it is correct: Leaning on glass is a safety hazard. It is forbidden.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake. (c) “don’t must” is a Structural Error. (b) “couldn’t” is a Meaning Trap.
10 (c) mustn’t
- Why it is correct: Speaking loudly disturbs others and violates the public order of the museum.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake. (b) “mustn’t speaking” is a Structural Error. (d) “needn’t” is a Meaning Trap.
11 (b) don’t have to
- Why it is correct: The 3-day ticket removes the pressure to see everything in one day. It is unnecessary to rush.
- Distractor Analysis: (a) “mustn’t” is a Common Mistake. (c) “aren’t have to” is a Structural Error. (d) “cannot” is a Meaning Trap.
12 (d) don’t have to
- Why it is correct: Small bags are allowed, so leaving them at security is not an obligation.
- Distractor Analysis: (a) “mustn’t” is a Common Mistake. (b) “don’t need” is a Structural Error (requires “to”). (c) “shouldn’t” is a Meaning Trap.
13 (b) mustn’t
- Why it is correct: Touching open sculptures causes gradual damage from skin oils. It is strictly forbidden.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake (implies “you can touch them if you feel like it”, which is terrible). (c) “mustn’t to touch” is a Structural Error. (d) “wouldn’t” is a Meaning Trap.
14 (c) mustn’t
- Why it is correct: Running causes accidents in crowded public spaces. It is banned.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake. (b) “don’t must” is a Structural Error. (d) “shouldn’t” is a Meaning Trap.
15 (b) don’t have to
- Why it is correct: Reading the text is completely optional and depends on the visitor’s energy levels.
- Distractor Analysis: (a) “mustn’t” is a Common Mistake. (c) “haven’t to read” is a Structural Error. (d) “won’t” is a Meaning Trap.
16 (d) mustn’t
- Why it is correct: Blocking fire exits is illegal and dangerous. It is an absolute prohibition.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake. (b) “mustn’t blocking” is a Structural Error. (c) “needn’t” is a Meaning Trap.
17 (c) don’t have to
- Why it is correct: Buying souvenirs is not mandatory; you have the freedom to walk past the shop.
- Distractor Analysis: (a) “mustn’t” is a Common Mistake. (b) “not have to” is a Structural Error. (d) “shouldn’t” is a Meaning Trap.
18 (b) don’t have to
- Why it is correct: Taking off shoes is unnecessary. The obligation does not exist here.
- Distractor Analysis: (a) “mustn’t” is a Common Mistake. (c) “haven’t to” is a Structural Error. (d) “wouldn’t” is a Meaning Trap.
19 (d) mustn’t
- Why it is correct: Making calls in quiet zones ruins the experience for others and is against the rules.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake. (b) “don’t must” is a Structural Error. (c) “shouldn’t” is a Meaning Trap (too weak for a zone rule).
20 (c) mustn’t
- Why it is correct: Ignoring security is the ultimate breach of public order. You are commanded to obey them.
- Distractor Analysis: (a) “don’t have to” is a Common Mistake (saying “you don’t have to ignore them” implies you still could). (b) “mustn’t to ignore” is a Structural Error. (d) “shouldn’t” is a Meaning Trap.
GRAMMAR POINTS TO REMEMBER
1 MUSTN’T (Public Rules & Strict Prohibitions):
- Meaning: You are strictly forbidden to do this. It is a rule to protect valuable property, ensure safety, or maintain order. In a museum, it means “Do Not”.
- Museum Context: You mustn’t touch the art. You mustn’t take flash photos. You mustn’t cross the red line.
- Structure: Subject + mustn’t + Verb (bare infinitive). (Never use “to”).
2 DON’T HAVE TO (Absence of Obligation & Free Choice):
- Meaning: It is NOT required. You are given the freedom to choose, or a service is provided so you don’t need to do the work.
- Museum Context: You don’t have to pay for the audio guide (it’s free). You don’t have to stay with the group (you can explore alone).
- Structure: Subject + don’t/doesn’t have to + Verb (bare infinitive).
The Tour Guide’s Rule: Use “mustn’t” to protect the museum (preventing damage). Use “don’t have to” to make the tourists feel comfortable (removing pressure or cost).