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LEARN

15.3 Passive Voice with Modals

Active Voice Passive Voice
You may return purchases with a receipt. Purchases may be returned with a receipt.
You can’t return them without a receipt. They can’t be returned without a receipt.

Passive Voice with Modals
Subject Modal (Not ) Be Past Participle
Past The ship couldn’t seen because of the storm.
Present The topics can be researched online.
Future The report might not finished on time.

1. The passive voice is often used with modals* The test can be completed at home.
to talk about past, present, and future. Projects must be finished next week.

2. Use a modal + be + past participle to form The building might be closed.
the passive.

3. To form questions with modals in the passive, A: Can the test be completed at home?
place the modal before the subject. B: Yes, it can.

A: When should the project be finished?
B: Next week.

* See Units 12 and 13 to review the meanings and uses of modals.

4 Complete the information sheet with the correct passive form of the words in parentheses.

August Archaeological Dive:
Information Sheet

Welcome to this exciting dive! Over the next two weeks, many interesting items
(1) may be found (may / find) at this site. Some important items
(2) (might / recover) from the wreck, so care

(3) (must / take) not to damage them. Please take note:
• Tools and diving equipment will be provided. Personal tools and equipment

(4) (may not / use).
• New discoveries (5) (must not / move) without permission.
• New assistants (6) (could / require) to complete a training

course away from the main dive site.
• Identification (7) (should / wear) at all times.
• Our dive doctor (8) (can / consult) when necessary.

Thank you all for your cooperation, and welcome to the team!

406 PASSIVE VOICE AND PARTICIPIAL ADJECTIVES
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