Active voice Vs Passive voice

Active voice  Vs  Passive voice  
Outcome: By the end of the lesson you will be able to use Simple Past Passive to talk about the news
Analize the picture and the sentences

Active: Beautiful giraffes roam the savannah.
Passive: The savannah is roamed by beautiful giraffes.
Roam: wander around a place(deambular, vagar)

What country is the Savannah located in? The savannah is a grassland biome found worldwide in the areas near the equator. Savanna grasslands cover half of the African continent, including the Serengeti Plains of Tanzania, perhaps the world's most famous savanna. Savannas also cover portions of northern Australia, India, Brazil, Colombia and Venezuela.

To change a sentence from active to passive voice, do the following:

         ACTIVE VOICE                                           PASSIVE VOICE 
Sara mailed the letter yesterday            The letter was mailed by Sara yesterday

              verb                                                         verb be auxiliary + past participle

In most English sentences with an action verb, the subject performs the action denoted by the verb.

Use the active form of a verb to focus on the “doer” or cause of the action.

One can change the normal word order of many active sentences (those with a direct object) so that the subject is no longer active, but is, instead, being acted upon by the verb - or passive.  

Use the passive form to focus on the “receiver” of the action.
These example shows that the subject is  doing the verb's action.

v The man must have eaten five hamburgers

     The man (subject) is doing the eating (verb).
Note in these examples how the subject-verb relationship has changed.

v Five hamburgers must have been eaten by the man.

    Five Hamburgers (subject) are being eaten (verb)
1.  A student found a bag on a bus.
2.  The authorities close the airport.
3.  A teenager has seen two bears in a yard.
4.  The accident didn’t injure the passengers.
1.   A bag was found on a bus.
2.   The airport is closed by the authorities.
3.   Two bears have been seen in a yard.
4.   The passengers weren’t injured.
Because the subject does or "acts upon" the verb in such sentences, the sentences are said to be in the active voice.
Because the subject is being "acted upon" (or is passive), such sentences are said to be in the passive voice.
Analize this chart.
ACTIVE VOICE: At each concert, the soprano sang at least one tune from a well-known opera.
                                                    doer of action action Receiver of action 
PASIVE VOICE: At each concert, at least one tune from a well-known opera WAS SUNG by the soprano.
                                                                     receiver of action                               action            doer of action 

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