You're right that there are indeed 12 tenses in English grammar, but it's not entirely accurate to say that only 8 of them can be switched between active and passive voice. Each tense can theoretically be expressed in both active and passive, though some tenses might be used less frequently in the passive voice for stylistic reasons.
Here's a breakdown of all 12 tenses and their passive voice counterparts:
**Simple Tenses:**
* **Present Simple:** Active Voice: She writes a letter. Passive Voice: A letter is written by her.
* **Present Continuous:** Active Voice: They are building a house. Passive Voice: A house is being built by them.
* **Present Perfect:** Active Voice: I have finished my project. Passive Voice: My project has been finished (by me).
* **Past Simple:** Active Voice: He wrote a letter. Passive Voice: A letter was written by him.
* **Past Continuous:** Active Voice: They were building a house. Passive Voice: A house was being built by them.
* **Past Perfect:** Active Voice: I had finished my project before the deadline. Passive Voice: My project had been finished (by me) before the deadline.
**Future Tenses:**
* **Simple Future:** Active Voice: She will write a letter. Passive Voice: A letter will be written by her.
* **Future Continuous:** Active Voice: They will be building a house. Passive Voice: A house will be being built by them.
* **Future Perfect:** Active Voice: I will have finished my project by then. Passive Voice: My project will have been finished (by me) by then.
**Modal Tenses:**
* **Present Modal:** Active Voice: She **must** write a letter. Passive Voice: A letter **must** be written by her.
* **Past Modal:** Active Voice: He **should** have written a letter yesterday. Passive Voice: A letter **should** have been written by him yesterday.
**Perfect Modal Tenses:**
* **Present Perfect Modal:** Active Voice: I **may** have finished my project already. Passive Voice: My project **may** have been finished (by me) already.
It's important to note that some modal verbs might not be commonly used in the passive voice due to their inherent focus on the subject's ability or obligation to perform an action.
So, although all tenses technically allow for conversion between active and passive voice, some might be less natural or stylistically appropriate in the passive form. Remember, using the active voice often leads to clearer and more engaging writing.
Is there anything else you'd like to know about tenses or the active/passive voice? I'm happy to help further!
Active_and_Passive_Voice_PPT for studentswho did not need it.pptx
1. Active & Passive Voice
A presentation by Harris Masood & Hamza
Iftikhar
2. Contents of the presentation
• Explaining Active & Passive voice
• How to convert sentences between active and passive voice
• When to use which and why
3. Sentence Structure (SVO)
The police arrested the robbers.
(subject) (verb) (object)
*A verb is an action. The performer of that action is called the subject,
and the one on whom that action is performed is called the object.
4. Active Voice
Millions of viewers watched the World Cup.
(Subject) (verb) (object)
Passive Voice
The World Cup was watched by millions of viewers.
(object) (verb) (subject)
5. Changing Active to Passive Voice
• Positions of the subject and the object are switched.
• Auxiliary verbs and prepositions are added where necessary.
• The verb is converted to its 3rd form.
6. Active Voice
The storm caused the delay of the flight
(subject) (verb) (object)
Passive Voice
The delay of the flight was caused by the storm
(object) (h.verb) (m.verb) (preposition) (subject)
7. Some sentences cannot be converted
to the passive voice.
Sentences containing intransitive verbs cannot be converted to
the passive voice.
For example: ‘The lion roared’, ‘the glass cracked’
(since these sentences do not contain an object, they cannot
be converted to the passive voice)
8. When to use what & why ?
The active voice is used when:
• The sentences need to be kept short and
simple.
• The focus is on the subject.
9. The passive voice is used when :
• The subject is unknown or irrelevant.
• The subject is obvious.
• The focus is on the verb or object rather than the subject.
10. The passive voice should be generally avoided :
• When writing news articles and stories.
• When the subject of the sentence is more important than the
object.
• When there needs to be a direct relationship between the subject
and the verb.
