Passive Voice: Form and Use
Passive Voice: Form and Use
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Passive Voice: Form and Use
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Learning goal
I can recognise and use the passive voice accurately in sentences.
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What words come to mind when you hear passive voice?
Use this to surface prior ideas such as 'by', 'was', 'formal', 'unknown doer', or confusion with past tense. Briefly address misconceptions before teaching.
What is the passive voice?
The passive voice puts the focus on the action or the receiver of the action.
Active: The chef cooks the meal.
Passive: The meal is cooked by the chef.
In the passive sentence, the meal comes first because it is the main focus.
Students often notice the word order first. Emphasise that passive voice is not just swapping words around; it changes what the sentence focuses on.
Active and passive compared
Active voice: the subject does the action
Passive voice: the subject receives the action
Both can describe the same event
The choice depends on what the writer wants to emphasise
A quick contrast helps students see meaning and focus, not only form. Keep examples simple and concrete.
How the passive is built
The passive voice is made with:
form of _to be_ + past participle
Examples:
The door is closed.
The windows are cleaned.
The letter was sent.
The books were packed.
Point out that the verb 'to be' changes for tense and subject, but the past participle stays as the main verb form.
Present simple passive
Use the present simple passive for actions that are regular, general, or true now.
Pattern:
am / is / are + past participle
Examples:
English is spoken here.
Lunch is served at 12.
The classrooms are cleaned every day.
Link this to familiar present simple uses: routines, facts, and timetables.
Past simple passive
Use the past simple passive for finished actions in the past.
Pattern:
was / were + past participle
Examples:
The match was played yesterday.
The bridge was built in 2005.
The bags were checked at the entrance.
Students may confuse present and past passive because both use 'be'. Keep the time words clear: yesterday, last week, in 2005.
What is the main pattern of the passive voice?
have + verb
be + past participle
do + infinitive
will + verb
Checks the core form taught in slides 2 to 6. Distractors are common verb patterns students may confuse with passive forms.
Complete the summary
In the passive voice, the subject receives the action. It is built with a form of be and a past participle. In the present simple passive, we use am, is, or are. In the past simple passive, we use was or were.
The final blank is 'was' because 'or were' is already given, echoing the pattern on the content slides.
Why use the passive voice?
to focus on the action
to focus on the receiver
when the doer is not the main idea
often used in reports, news, and formal writing
This slide answers the lesson's central question: writers choose passive voice when the result or receiver matters more than the doer.
When the agent is unknown
Sometimes we do not know who did the action.
Examples:
My bike was stolen.
The window was broken last night.
The sentence is still complete without naming the doer.
Use 'agent' as the grammar term for the doer in a passive sentence, but keep the explanation student-friendly.
When the agent is unimportant or obvious
We may not need to name the doer because it is unimportant or obvious.
Examples:
The homework was collected.
The criminals were arrested.
Rice is grown in many countries.
The action matters more than the agent.
For 'homework was collected', the class can infer the teacher. For 'criminals were arrested', the class can infer the police. This helps students understand why 'by ...' is often omitted.
Using by to name the agent
If the doer is important, add an agent phrase with by.
Examples:
The song was written by Adele.
The castle was built by Norman rulers.
The cake was made by my aunt.
Use by only when the agent adds useful information.
Stress that 'by' is optional in many passive sentences. Students often overuse it once they learn the rule.
When do we often use the passive voice?
When the doer is unknown
When the subject is longer
When the verb is irregular
When the sentence is negative
Tests purpose, not form. The correct option matches slides 7 to 10; the others are unrelated grammar features students may wrongly link to passive voice.
Complete the explanation
Writers use the passive to focus on the action or the receiver. If the agent is unknown, unimportant, or obvious, it can be omitted. If the doer is important, we can add an agent phrase with by.
Echoes the exact lesson language from slides 7 to 10 and reinforces when 'by' is useful.
Subject and object change places
To change active to passive:
the object of the active sentence becomes the subject of the passive sentence
the verb changes to be + past participle
the old subject can be added with by
Active: The artist painted the wall.
Passive: The wall was painted by the artist.
Students need this transformation idea before they can convert sentences accurately. Keep the labels 'subject' and 'object' visible.
Changing active to passive step by step
Active: The teacher marked the tests.
Find the object: the tests
Move it to the subject position
Change the verb: marked → were marked
Add the agent if needed: by the teacher
Passive: The tests were marked by the teacher.
Model the steps slowly. Students often jump straight to the answer and forget to check tense or agreement.
Choosing the correct form of be
The form of be must match:
the tense of the original sentence
whether the new subject is singular or plural
Examples:
The book is read by many students.
The books are read by many students.
The book was read yesterday.
The books were read yesterday.
A common error is using the right participle with the wrong form of 'be', such as 'the books was read'.
Common mistakes to avoid
forgetting be: The door closed ✗
using the wrong participle: is close ✗
keeping the active word order
adding by when it is not needed
choosing passive when active is clearer
The first example can also be a correct active sentence in some contexts, so explain that students must check the intended meaning: passive needs 'be + past participle'.
Which passive sentence is correct?
The tests marked by the teacher.
The tests were marked by the teacher.
The teacher was marked the tests.
The tests were mark by the teacher.
Targets common mistakes from slides 11 to 14: missing 'be', wrong word order, and wrong participle.
Complete the change from active to passive
In an active sentence, the object can move to the subject position. Then we choose the correct form of be and use the past participle. The old subject can be added with by if it is important.
Checks the transformation process and links together subject-object change, verb form, and agent phrase.
Glossary
active voice - a sentence form where the subject does the action
passive voice - a sentence form where the subject receives the action
subject - the person, thing, or idea the sentence is about
object - the person or thing that receives the action in an active sentence
past participle - the verb form used in perfect tenses and passive forms, such as written or cleaned
agent - the doer of the action in a passive sentence
agent phrase - the part of a passive sentence that names the doer, usually with by
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Glossary
present simple passive - the passive form using am, is, or are with a past participle
past simple passive - the passive form using was or were with a past participle
to be - the verb used to build the passive, such as is, are, was, and were
by - the word used to introduce the agent in a passive sentence
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