Suffix Worksheets - Free Printable

To solve the exercises involving words like "must," "can't," and "might," we need to carefully analyze each sentence and determine the appropriate word based on the context. Let's go through each question step by step.

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Exercise 1: Complete the sentences with "must" or "can't."

#### 1. You _______ be quiet in the library.
- Context: Libraries are places where silence is required.
- Solution: You must be quiet in the library.
- Explanation: The word "must" indicates a strong obligation or necessity.

#### 2. You _______ smoke here.
- Context: Smoking is often prohibited in certain areas.
- Solution: You can't smoke here.
- Explanation: The word "can't" indicates prohibition or impossibility.

#### 3. You _______ wear a uniform at school.
- Context: Schools typically require students to wear uniforms.
- Solution: You must wear a uniform at school.
- Explanation: The word "must" indicates a requirement or obligation.

#### 4. You _______ park your car here.
- Context: Parking might be restricted in certain areas.
- Solution: You can't park your car here.
- Explanation: The word "can't" indicates that parking is not allowed.

#### 5. You _______ follow the rules.
- Context: Following rules is usually mandatory.
- Solution: You must follow the rules.
- Explanation: The word "must" indicates an obligation.

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Exercise 2: Complete the sentences with "must," "can't," or "might."

#### 6. Tom _______ be guilty because he was seen leaving the crime scene.
- Context: Being seen at the crime scene suggests a strong possibility of guilt.
- Solution: Tom must be guilty because he was seen leaving the crime scene.
- Explanation: The word "must" indicates a high likelihood or certainty based on evidence.

#### 7. I _______ have forgotten my keys.
- Context: Forgetting keys is a possibility, but it is not certain.
- Solution: I might have forgotten my keys.
- Explanation: The word "might" indicates uncertainty or possibility.

#### 8. You _______ be late for work tomorrow.
- Context: Being late for work is a potential outcome, but it is not certain.
- Solution: You might be late for work tomorrow.
- Explanation: The word "might" indicates a possibility.

#### 9. We _______ win the competition if we practice hard.
- Context: Winning the competition is possible if certain conditions (like practicing hard) are met.
- Solution: We might win the competition if we practice hard.
- Explanation: The word "might" indicates a conditional possibility.

#### 10. The teacher _______ be angry if you don't finish your homework.
- Context: The teacher's reaction depends on whether the homework is finished.
- Solution: The teacher might be angry if you don't finish your homework.
- Explanation: The word "might" indicates a potential outcome based on a condition.

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Exercise 3: Complete the sentences with "must," "can't," or "might."

#### 11. I _______ have enough money to buy this phone.
- Context: Having enough money is uncertain without checking the balance.
- Solution: I might have enough money to buy this phone.
- Explanation: The word "might" indicates uncertainty.

#### 12. You _______ be careful when crossing the road.
- Context: Being careful is necessary for safety.
- Solution: You must be careful when crossing the road.
- Explanation: The word "must" indicates a strong obligation for safety.

#### 13. He _______ be lying because his story doesn't make sense.
- Context: A nonsensical story suggests a high likelihood of lying.
- Solution: He must be lying because his story doesn't make sense.
- Explanation: The word "must" indicates a strong inference based on evidence.

#### 14. She _______ be happy because she is smiling.
- Context: Smiling is often associated with happiness, but it is not certain.
- Solution: She might be happy because she is smiling.
- Explanation: The word "might" indicates a possibility.

#### 15. You _______ be tired after working all day.
- Context: Working all day typically leads to tiredness.
- Solution: You must be tired after working all day.
- Explanation: The word "must" indicates a strong likelihood based on the situation.

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Final Answers:

1. must
2. can't
3. must
4. can't
5. must
6. must
7. might
8. might
9. might
10. might
11. might
12. must
13. must
14. might
15. must

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Boxed Final Answer:

\[
\boxed{
\text{1. must, 2. can't, 3. must, 4. can't, 5. must, 6. must, 7. might, 8. might, 9. might, 10. might, 11. might, 12. must, 13. must, 14. might, 15. must}
}
\]