Topic 2: Active and Passive Voice (Detailed)
Building on the introduction, understanding how to convert sentences between active and passive voice across different tenses is an importan
Core concept
To convert active to passive, the object becomes the subject, the verb changes to 'be + past participle,' and the original subject becomes optional (with 'by').
How it works
Different tenses form passive voice differently: present simple uses 'is/am/are + past participle,' while past simple uses 'was/were + past participle.'
Why it matters
Not all sentences can be converted to passive voice - only sentences with a direct object (transitive verbs) can be made passive.
Key detail
Choosing between active and passive voice depends on what we want to emphasise - the doer of the action or the action itself.
Exam highlight
Key diagram

- A formula chart with worked examples in two tenses.
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Quick notes
• Active to passive: object becomes subject.
• Verb becomes 'be + past participle'.
• Original subject becomes optional (with 'by').
• Present simple passive: is/am/are + past participle.
• Past simple passive: was/were + past participle.
• Only transitive verbs (with objects) can be passive.
• Choice depends on what to emphasise.
• Emphasise doer (active) or action (passive).