Practice using modal verbs like can, could, may, might, must, and should in context.

Let's solve each sentence by choosing the correct modal verb from the list provided:
can, can't, could, couldn't, may, may not, might, might not, should, shouldn't, must, mustn't

We'll go through each one step by step and explain why a particular modal verb fits best.

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1. There are many tomatoes in the fridge. You __________ buy any more.

✔ shouldn't
👉 You don’t need to buy more because there are already enough. It’s advice against doing something unnecessary.

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2. It’s a hospital. You __________ smoke.

✔ mustn't
👉 Smoking is strictly forbidden in hospitals. "Mustn't" expresses prohibition.

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3. I __________ speak Arabic when I was a child and we lived in Morocco. But after we moved back to Canada, I forgot almost everything. Now, I __________ just say a few words in Arabic.

✔ could, can
👉 "Could" refers to past ability (childhood). "Can" refers to present limited ability.

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4. The teacher said we __________ read this book for a book report.

✔ must
👉 This implies it’s required or obligatory — a strong instruction.

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5. If you want to learn to speak English very well, you __________ work hard.

✔ must / should
👉 Both are possible, but must is stronger and better here because it emphasizes necessity.
✔ Best answer: must
👉 To achieve a goal like speaking English well, effort is necessary.

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6. Take an umbrella. It __________ rain later.

✔ might / may
👉 Both are acceptable for possibility. "Might" is slightly more tentative.
✔ Use: might (slightly more common in spoken English)
👉 Suggests a possibility of rain.

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7. You __________ leave small objects lying around. These objects __________ (לִהְיוֹת) be swallowed by children.

✔ mustn't, might
👉 "Mustn't" = prohibition (dangerous).
"might be swallowed" = possibility of danger.
Note: "לִהְיוֹת" means "to be" in Hebrew — so the sentence is about being swallowed.

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8. People __________ walk on the grass.

✔ mustn't
👉 Often a rule in parks or formal areas — prohibited.

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9. Drivers __________ stop when the traffic lights are red.

✔ must
👉 Legal obligation — required by law.

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10. You __________ take your umbrella. It is not raining.

✔ don't have to → But only can't or needn't are listed? Wait!
Wait — the list includes can't, mustn't, etc., but don't have to isn't in the list.
But we must pick from the given modals.

So:
✔ needn't is not listed. So use don't have to → but not available.
Best fit: can't? No — that means inability.
Or mustn't? That would mean it's forbidden — not true.
Hmm...

Actually: "You don’t have to" = no obligation.
But since don't have to isn't a modal, we look for may not or might not?

Wait — perhaps the intended answer is:
✔ don't have to → but again, not in list.

Alternatively, maybe they expect:
✔ needn't → not in list.

But among the listed modals, none perfectly express "no obligation". However, may not means “it’s allowed not to” — which is close.

But let’s think:
"You may not take your umbrella." → That means “you are not allowed to” — wrong meaning.

So better:
✔ don’t have to → not in list.

Wait — actually, the closest is:
✔ can't? No — you *can* take it.

So perhaps the intended answer is:
✔ don’t have to → but not in list.

But wait — may not = permission not to do it.
"May not" means “it’s permitted not to” → yes, you’re allowed to skip it.

So:
✔ may not
→ "You may not take your umbrella" = It’s okay if you don’t take it.

That works.
But note: “You may not” = you're allowed not to.

So: ✔ may not

Alternatively, some might say don’t have to, but since it’s not in list, may not is acceptable.

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11. Ron doesn’t see well. He __________ wear glasses.

✔ should
👉 Advice: He ought to wear glasses to help his vision.

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12. Danny __________ play the guitar when he was ten years old.

✔ could
👉 Past ability — he had the skill at age 10.

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13. You __________ go out in the rain without a coat.

✔ mustn't
👉 Prohibition due to danger (getting sick). Strong warning.

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14. The teacher says we __________ eat in the classroom.

✔ mustn't
👉 Rule — eating is not allowed in class.

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15. I __________ meet you tonight because I want to go to sleep early.

✔ can't
👉 Inability to meet — due to personal schedule.

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16. It was raining yesterday so we __________ go on a picnic.

✔ couldn't
👉 Past inability — weather prevented the picnic.

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17. My father has back problems. He __________ carry heavy things.

✔ mustn't / shouldn't
👉 "Mustn't" = strict prohibition (doctor's order).
"Shouldn't" = advice.
But since it's a health issue, shouldn't is better — unless it's a rule.

But mustn't implies it’s forbidden.
Shouldn't is safer.

But both are possible.

However, mustn't suggests a strong rule — like medical advice.

But often, people say "shouldn't" for health reasons.

But here, since it's a physical condition, and carrying heavy things is dangerous, mustn't is acceptable.

But shouldn't is more natural.

Wait — check the options.

✔ shouldn't
👉 Better: advice based on health.

But mustn't could be used if it’s medically forbidden.

But in everyday language, shouldn't is more common.

So: ✔ shouldn't

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18. I was happy that Ron __________ go to the party last night.

✔ could
👉 "Could" = past ability — he was able to go.

Also: "I was happy that he was able to go."

So: ✔ could

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19. All soldiers __________ wear uniforms.

✔ must
👉 Obligation — required by military rules.

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20. You __________ wear a hat in the sun. It’s very important!

✔ must
👉 Strong recommendation — essential for protection.

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## ✔ Final Answers:

1. shouldn't
2. mustn't
3. could, can
4. must
5. must
6. might
7. mustn't, might
8. mustn't
9. must
10. may not
11. should
12. could
13. mustn't
14. mustn't
15. can't
16. couldn't
17. shouldn't
18. could
19. must
20. must

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## 📝 Summary of Modal Verbs Used:

| Modal | Meaning |
|------|--------|
| must | Obligation, necessity |
| mustn't | Prohibition |
| should | Advice, recommendation |
| shouldn't | Advice against doing |
| can | Ability, permission |
| can't | Inability, impossibility |
| could | Past ability, possibility |
| couldn't | Past inability |
| may / might | Possibility |
| may not / might not | Permission not to, low possibility |

Let me know if you'd like a printable version or explanations in another language!