1.Active voice.
2. Passive voice.
When we express an idea giving importance to the doer, the sentence is written in the active form. That means that the ‘doer of the action’ is active.
•He wrote a letter.
When we express an idea giving importance to the action rather than to the doer, the sentence is written in the passive form.
That means that the ‘doer of the action’ is not active but passive.
•A letter was written by him.
In passive form, the verb will be in past participle form.
“Write" is Present tense form of the verb.
“Wrote" is past tense form of the verb
“Written" is past participle form of the verb
Since “a letter" was singular form, it is followed by singular-past tense verb “was".
Let us see one by one:
1.Active voice.
As we saw already, when we express an idea giving importance to the doer, the sentence is written in the active voice.
In active voice the verb is controlled by the subject.
The object in the active voice becomes the subject in the passive voice.
The subject in the active voice becomes the object of the preposition “by" in the passive voice.
Examples:
He helped them in their studies.
They invite me.
The boys pluck flowers.
I take the responsibility.
BHEL exports boilers.
My mother prepares delicious foods.
We expect you.
The Prime Minister inaugurated the conference.
They boycotted the function.
The C.B.I. will investigate this crime.
2.Passive voice.
When we express an idea giving importance to the action rather than to the doer, the sentence is written in the passive voice.
In passive voice the verb is controlled by the object.
The object in the active voice becomes the subject in the passive voice.
The subject in the active voice becomes the object of the preposition “by" in the passive voice.
Only the past-participle of the main verb is used in the passive verb (along with the helping verb).
Examples:
I. They treat me very well. (Active voice)
II.He treats me very well. (Active voice)
In the example-I, the subject is in plural form (they). So the verb (treat) is used in accordance with that.
But in the example-II, the subject is in singular form (he). So the verb (treats) is used in accordance with that.
Let us see the Passive voices of these sentences.
Examples:
I.I am treated very well by them.
II.I am treated very well by him.
In both these sentences, the verbs are modified only by the singular Pronoun “I", not by the subjects of the sentences.
•He damages the flowers. (Active voice)
•The flowers are damaged by him. (Passive voice)