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 typically places where silence is required.
- Solution: You must be quiet in the library.
- Explanation: The use of "must" indicates a strong obligation or necessity.

#### 2. You _______ smoke here.
- Context: Smoking is often prohibited in certain areas, such as indoors or public spaces.
- Solution: You can't smoke here.
- Explanation: The use of "can't" indicates prohibition or impossibility.

#### 3. Teachers _______ give exams at the end of the term.
- Context: Giving exams at the end of the term is a common requirement for teachers.
- Solution: Teachers must give exams at the end of the term.
- Explanation: The use of "must" indicates an obligation or necessity.

#### 4. You _______ wear a uniform at school.
- Context: Wearing a uniform is usually mandatory in schools.
- Solution: You must wear a uniform at school.
- Explanation: The use of "must" indicates a strict requirement.

#### 5. You _______ park your car here.
- Context: Parking restrictions are often enforced in certain areas.
- Solution: You can't park your car here.
- Explanation: The use of "can't" indicates that parking is not allowed.

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

#### 6. I _______ finish my homework before going out.
- Context: Finishing homework before going out is likely a requirement or obligation.
- Solution: I must finish my homework before going out.
- Explanation: The use of "must" indicates a necessary action.

#### 7. He _______ be very busy today.
- Context: The speaker is making an educated guess about someone's schedule.
- Solution: He might be very busy today.
- Explanation: The use of "might" indicates possibility or uncertainty.

#### 8. You _______ leave your keys in the car.
- Context: Leaving keys in a car is generally not advisable due to security risks.
- Solution: You can't leave your keys in the car.
- Explanation: The use of "can't" indicates prohibition or something that should not be done.

#### 9. She _______ have arrived already.
- Context: The speaker is speculating about someone's arrival.
- Solution: She might have arrived already.
- Explanation: The use of "might" indicates possibility or uncertainty.

#### 10. We _______ arrive on time if we take this route.
- Context: Taking a specific route may ensure timely arrival.
- Solution: We must arrive on time if we take this route.
- Explanation: The use of "must" indicates a strong likelihood or necessity based on the chosen route.

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Final Answers:

1. You must be quiet in the library.
2. You can't smoke here.
3. Teachers must give exams at the end of the term.
4. You must wear a uniform at school.
5. You can't park your car here.
6. I must finish my homework before going out.
7. He might be very busy today.
8. You can't leave your keys in the car.
9. She might have arrived already.
10. We must arrive on time if we take this route.

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Boxed Final Answer:

\[
\boxed{
\begin{array}{l}
1. \text{must} \\
2. \text{can't} \\
3. \text{must} \\
4. \text{must} \\
5. \text{can't} \\
6. \text{must} \\
7. \text{might} \\
8. \text{can't} \\
9. \text{might} \\
10. \text{must}
\end{array}
}
\]