Active and Passive Voice (Advanced)

• Convert sentences between active voice (subject performs the action) and passive voice (subject receives the action) across different tenses.
• Recognise when passive voice is more appropriate (e.g., when the doer is unknown or unimportant).

1. Active voice: Subject + Verb + Object (e.g., "The cat chased the mouse.")
2. Passive voice: Object + "to be" + Past Participle + "by" + Subject (e.g., "The mouse was chased by the cat.")
3. Passive voice is common in formal/scientific writing where the focus is on the action, not who did it (e.g., "The experiment was conducted carefully.")
4. The tense of "to be" in passive voice must match the tense of the original active sentence.

Convert to passive voice: "The chef cooks the meal."

Active: The chef cooks the meal.
Passive: The meal is cooked by the chef.
(Present tense "is" matches present tense "cooks".)

• Using the wrong form of "to be" for the tense (e.g., using "is" for a past-tense sentence).
• Forgetting the past participle form of irregular verbs (e.g., "wrote" → "written", not "writed").
• Omitting "by + doer" when it's actually needed for clarity.

• Convert to passive: "She wrote a letter."
• Convert to passive: "They will build a bridge."

Open the Practice tab for graded questions on Active and Passive Voice (Advanced).