The passive voice of "the cat chased the bird" would be "the bird was chased by the cat." In the passive voice, the subject of the sentence receives the action rather than performing it. The passive voice is formed by using a form of "to be" (in this case, "was") followed by the past participle of the main verb ("chased").
In active sentences the subject or actor (the doer of the action of the verb) comes at the before the verb eg: The dog chased the cat. In this sentence the dog is the doer of the action 'chased'. Passive sentences allow us to put some thing else that is not the subject in the position of the subject eg: The cat was chased (by the mouse). The actor/agent 'by the mouse' - can be left out
This is not an active sentence so it cannot be changed to a passive sentence. Active sentences have a subject and a verb. eg The dog chased the cat. As a passive sentence -- The cat was chased.
In active voice, the subject performs the action denoted by the verb (e.g., "The dog chased the cat"). In passive voice, the subject receives the action denoted by the verb, with the object of the active sentence becoming the subject of the passive sentence (e.g., "The cat was chased by the dog").
If you know the agent /doer of the action then the agent becomes the subject of the active sentence eg passive - The cat was chased by the dog (by the dog) tells us the dog is the agent or doer of the verb this becomes the subject. active - The dog chased the cat. If you don't know the agent of the passive sentence then you have to put someone or something as the subject. passive - The cat was chased. active - Something chased the cat.
In active voice, the subject of the sentence performs the action, while in passive voice, the subject receives the action. For example, in active voice "The cat chased the mouse," the cat is the subject performing the action. In passive voice, the sentence would be "The mouse was chased by the cat," where the mouse is the subject receiving the action.
Active sentences are subject + verb + object. The show the doer (subject ) of the verb.eg The dog chased the cat.Passive sentences are not s + v+ o.eg The cat was chased. (past simple passive)Passive sentences have the verb form - be+past participle eg was chasedAnother example The cake has been eaten. (present perfect passive).If you want to show who did the action in a passive sentence then add - by+noun or noun phrase.eg The cat was chased by the dog.
The active and passive voices are used to show what receives or initiates the action in a sentence. With a passive voice, the subject receives the action: "The glass was knocked off the table." In the active voice, the subject initiates the action: "I knocked the glass off the table." The passive voice is often criticized as a way of de-emphasizing the actor, but it is useful, particularly if the actor is unknown, or you.
An active sentence has the word order -- subject + verb + object. In an active sentence you can see who does the action. eg -- The dog chased the cat. (the dog does the action)In a passive sentence the word order is -- object + verb. The person or thing that does the action (agent) is not necessarily given eg -- The cat was chasedIf you want to say who or what did the action in a passive sentence you add it at the end -- by + noun/noun phraseeg -- The cat was chased by the dog. or The cat was chased by a pack of dogsPassive sentences are often used if you a writing about a process, where who or what does the action is not important. eg Tea is grown in China. It is processed and is packed in boxes.Or other sentences where the agent is not known. eg The Mona Lisa was painted around 1503.Or if the agent is the most important piece of information. eg The painting was painted by Van GoghA passive sentence verb has the form -- be + past participle eg was chased, were chased, is being chased, had been chasedetc
In English sentences the usual word order is -- Subject + verb + object.eg The dog chased the cat. -- the subject (dog) did the action of the verb (chased) to the object (cat)This is called an active sentence.In passive sentences there is no subject.eg The cat was chased. -- The object (cat) is now in the subject position and the verb has the formbe + past participle.If you want to say who or what did the action you can add -- by + noun eg,The cat was chased by the dog. by + noun (or noun phrase) is called the agent.More examples;Active: We keep the sugar in the cupboard.passive: The sugar is kept in the cupboard.active: The police brought the boy home.passive; The boy was brought home by the police.
Active means the subject of the sentence performs the action: I put the chair over there.Passive means the subject of the sentence has the action performed on it: The chair was put over there by me.In an active sentence we can see who or what does the action of the verb eg.The cat chased the mouse.The subject - cat - does the action - chase. The mouse is the object of the sentence, the 'receiver' of the action chase.In a passive sentence the object is at the beginning of the sentence in the subject position.The mouse was chased.If you want to say who or what chased the mouse then you use 'by'.The mouse was chased by the cat. ('the cat' is called the agent)Passive is used when it is not important who or what does the action egThe Mona Lisa was painted in the 16th century.The form of a passive verb phrase is be + past participleegwas chased, was being chased, is chased, etcActive or passive is called voice.Infinitive, subjunctive or imperative form of a verb is called mood
I chased her until she caught me. The dawn chased the night away. The cat chased the bird to no avail.
Active voice: I took the cake. or: I made a mistake.Passive voice: The cake was taken. or: A mistake was made.When the verb takes the action from the subject (the doer) and passes on to the object (the receiver), the verb is said to be in Active voice.I helped my friend.When the subject receives the action, the subject is the receiver of the action, the verb is said to be in Passive Voice.My friend was helped (by me).It better to use active voice if the Doer of the action is known or mentioned.