By whom will the cat be belled?
The passive version is, noise has been made.
The mouse was killed by the cat.
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").
The mouse was killed by the cat.
In the active voice, the subject is the person or thing that does the action, for example 'the cat went home'. In the passive voice, the subject doesn't do the action. For example, 'the cat was taken home'. In 'the cat went home', we know who went home - it's the cat. In 'the cat was taken home', we don't know who took the cat home. So we use the passive if we don't know or don't care who does the action.
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 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.
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.
Not possible as the verb 'to go' is intransitive.
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.