Every sentence you speak or write carries a hidden choice — who or what should stand at the center of attention. This choice is called Voice, and it decides whether the subject performs the action or receives it. Most Bangladeshi students memorize Active and Passive Voice rules without truly understanding why the structure changes, which leads to confusion during SSC, HSC, and job exams. In this article, you will learn the real definition of Active and Passive Voice, the exact structure for every tense, and the step-by-step rules used to transform one into the other. Instead of dry theory, this lesson focuses on practical, easy-to-follow examples — more than 50 of them — so that you can apply the rules confidently in both exams and everyday English. By the end, changing Active to Passive Voice will feel simple, logical, and even enjoyable.

What Is Voice in English Grammar?

Voice is the form of a verb that shows whether the subject of a sentence performs an action or receives it. In simple words, Voice tells us who is doing the work and who is being affected by it.

English has two voices:

•          Active Voice

•          Passive Voice

Understanding both voices properly helps you write clear, natural, and grammatically correct sentences.

What Is Active Voice?

When the subject of a sentence performs the action directly, it is called the Active Voice. Here, the subject is always the doer of the action.

Structure

Subject + Verb + Object

For Example

•          I write a letter.

•          She plays cricket.

•          They finished the project.

In each sentence above, the subject is directly doing the action, which makes the sentence Active.

What Is Passive Voice?

When the subject of a sentence receives the action instead of performing it, it is called the Passive Voice. Here, the object of the active sentence becomes the subject.

Structure

Subject + Verb (to be) + Past Participle + by + Agent

For Example

•          A letter is written by me.

•          Cricket is played by her.

•          The project was finished by them.

Notice how the focus shifts from the doer to the receiver of the action.

Why Do We Change Active Voice to Passive Voice?

We use Passive Voice when:

•          the action is more important than the doer

•          the doer is unknown, obvious, or unimportant

•          we want to sound more formal or objective

For example, in news reports, scientific writing, and official notices, Passive Voice is used very often.

❌ Someone stole my bicycle.

✅ My bicycle was stolen.

Here the action of stealing matters more than who did it.

Active to Passive Structure for Every Tense

The table below shows the exact formula for changing Active Voice into Passive Voice across all twelve tenses.

Tense	Active Voice Structure	Passive Voice Structure
Simple Present	Subject + Verb (s/es) + Object	Object + am/is/are + Past Participle + by + Subject
Present Continuous	Subject + am/is/are + Verb (ing) + Object	Object + am/is/are + being + Past Participle + by + Subject
Present Perfect	Subject + have/has + Past Participle + Object	Object + have/has + been + Past Participle + by + Subject
Simple Past	Subject + Verb (past) + Object	Object + was/were + Past Participle + by + Subject
Past Continuous	Subject + was/were + Verb (ing) + Object	Object + was/were + being + Past Participle + by + Subject
Past Perfect	Subject + had + Past Participle + Object	Object + had + been + Past Participle + by + Subject
Simple Future	Subject + will/shall + Verb + Object	Object + will/shall + be + Past Participle + by + Subject
Future Perfect	Subject + will have + Past Participle + Object	Object + will have + been + Past Participle + by + Subject
Modal + Verb	Subject + Modal + Verb + Object	Object + Modal + be + Past Participle + by + Subject

 

Step-by-Step Rules to Change Active Voice into Passive Voice

Rule 1: Identify the Subject, Verb, and Object

Every Active sentence has three parts: Subject, Verb, and Object. To make it Passive, the Object becomes the new Subject.

•          Active: Rahim (Subject) helps (Verb) Karim (Object).

•          Passive: Karim (new Subject) is helped by Rahim.

Rule 2: Use the Correct Form of 'Be'

The verb 'to be' (am, is, are, was, were, been, being) must match the tense of the original Active sentence.

Rule 3: Change the Main Verb into Past Participle

The main verb of the Active sentence always changes into its Past Participle (3rd form) in the Passive sentence.

❌ The cake was bake by her.

✅ The cake was baked by her.

The main verb must be in the Past Participle form.

Rule 4: Add 'by' Before the Agent

The doer of the action (agent) is introduced with 'by' in the Passive sentence. If the doer is unknown or unimportant, it can be omitted.

•          The letter was written by Rina.

•          The window was broken. (doer unknown, so 'by' phrase is dropped)

Rule 5: Pronoun Changes in Passive Voice

Subject pronouns change into object pronouns when they move to the 'by' phrase.

Subject Pronoun	Object Pronoun (after by)
I	me
We	us
You	you
He	him
She	her
They	them
It	it

 

50 Examples of Active and Passive Voice

Study the examples below carefully. They are organized tense by tense so that you can see the pattern clearly and practice with confidence.

Simple Present

Active Voice	Passive Voice
I write a letter.	A letter is written by me.
She reads a novel.	A novel is read by her.
They play football.	Football is played by them.
He teaches English.	English is taught by him.

 

Present Continuous

Active Voice	Passive Voice
I am writing a letter.	A letter is being written by me.
She is cooking dinner.	Dinner is being cooked by her.
They are building a house.	A house is being built by them.
He is repairing the car.	The car is being repaired by him.

 

Present Perfect

Active Voice	Passive Voice
I have finished the work.	The work has been finished by me.
She has written three books.	Three books have been written by her.
They have completed the project.	The project has been completed by them.
He has cleaned the room.	The room has been cleaned by him.

 

Simple Past

Active Voice	Passive Voice
I wrote a letter.	A letter was written by me.
She cooked dinner.	Dinner was cooked by her.
They played the match.	The match was played by them.
He painted the wall.	The wall was painted by him.

 

Past Continuous

Active Voice	Passive Voice
I was writing a letter.	A letter was being written by me.
She was cooking dinner.	Dinner was being cooked by her.
They were watching a movie.	A movie was being watched by them.
He was fixing the bike.	The bike was being fixed by him.

 

Past Perfect

Active Voice	Passive Voice
I had finished the work before he came.	The work had been finished by me before he came.
She had written the letter.	The letter had been written by her.
They had completed the task.	The task had been completed by them.
He had repaired the roof.	The roof had been repaired by him.

 

Simple Future

Active Voice	Passive Voice
I will write a letter.	A letter will be written by me.
She will cook dinner.	Dinner will be cooked by her.
They will build a bridge.	A bridge will be built by them.
He will finish the report.	The report will be finished by him.

 

Future Perfect

Active Voice	Passive Voice
I will have finished the work by tomorrow.	The work will have been finished by me by tomorrow.
She will have written the book by June.	The book will have been written by her by June.
They will have completed the project by then.	The project will have been completed by them by then.
He will have painted the house by Friday.	The house will have been painted by him by Friday.

 

Sentences with Modal Verbs

Active Voice	Passive Voice
You must finish the work.	The work must be finished by you.
She can solve this problem.	This problem can be solved by her.
We should respect our teachers.	Our teachers should be respected by us.
They may invite him.	He may be invited by them.

 

Interrogative Sentences

Active Voice	Passive Voice
Do you write a letter?	Is a letter written by you?
Does she read the book?	Is the book read by her?
Did they finish the work?	Was the work finished by them?
Will he complete the project?	Will the project be completed by him?

 

Imperative Sentences

Active Voice	Passive Voice
Open the door.	Let the door be opened.
Close the window.	Let the window be closed.
Write the answer.	Let the answer be written.
Help the poor.	Let the poor be helped.

 

Sentences with Two Objects

Active Voice	Passive Voice
He gave me a book.	I was given a book by him. / A book was given to me by him.
She taught us grammar.	We were taught grammar by her. / Grammar was taught to us by her.
They offered him a job.	He was offered a job by them. / A job was offered to him by them.

 

Common Mistakes Students Make in Passive Voice

Mistake 1: Wrong Form of 'Be'

❌ The letter were written by her.

✅ The letter was written by her.

'Was' must be used with singular subjects.

Mistake 2: Using Base Form Instead of Past Participle

❌ The song was sing by them.

✅ The song was sung by them.

Always use the Past Participle form of the verb.

Mistake 3: Forgetting to Change Pronouns

❌ The cake was baked by she.

✅ The cake was baked by her.

Subject pronouns change into object pronouns after 'by'.

Mistake 4: Adding 'by' When the Doer Is Unknown

❌ My phone was stolen by someone unknown.

✅ My phone was stolen.

When the doer is unknown or unimportant, the 'by' phrase can be dropped.

Practice Exercise

Try changing the following Active sentences into Passive Voice. Check your answers using the rules explained above.

1.       She writes a story.

2.       They are painting the fence.

3.       He has completed the homework.

4.       We watched the movie.

5.       The teacher will explain the lesson.

6.       Can you solve this puzzle?

7.       Close the gate.

Conclusion

Active and Passive Voice are two essential structures that every English learner must master. Once you understand how the subject and object switch places, and how the verb form changes according to tense, transforming sentences becomes a simple, logical process rather than a memorization task. Practice the 50 examples above regularly, apply the rules in your own sentences, and you will notice a real improvement in both your exam performance and everyday English communication.