As a linguistic expert, I have a profound understanding of the structure and usage of various sentence forms. Let's delve into the concept of active and passive sentences.

In the realm of English grammar, the voice of a sentence can be either active or passive. The voice of a sentence is determined by the relationship between the subject and the verb.

Active Voice: This is when the subject of the sentence is the one performing the action. The focus is on the doer of the action. Active voice sentences usually have a straightforward structure where the subject comes first, followed by the verb and then the object. For example, "The farmer feeds the animals." Here, 'the farmer' is the subject who is performing the action, 'feeds' is the verb indicating the action, and 'the animals' are the object receiving the action.

Passive Voice: Conversely, a sentence is in the passive voice when the subject is the receiver of the action rather than the doer. The focus in passive sentences is on the action itself or the object of the action, rather than who is performing it. The structure typically involves the subject, followed by a form of the verb 'to be' and the past participle of the main verb, and often includes the preposition 'by' to introduce the doer of the action. For example, "The animals are fed by the farmer." In this sentence, 'the animals' are the subject and they are receiving the action, 'are fed' is the passive construction indicating the action being received, and 'by the farmer' shows who is performing the action, although it's not the main focus.

The choice between active and passive voice can significantly affect the style and tone of writing. Active voice is generally considered more direct and engaging, making it suitable for narratives, instructions, and when the doer of the action is known and important. Passive voice, on the other hand, can be used when the action is more important than the doer, when the doer is unknown or unimportant, or when a more formal or objective tone is desired.

It's also worth noting that overuse of the passive voice can lead to less concise and less engaging writing. Therefore, writers often strive for a balance between active and passive constructions to maintain clarity and interest.

Now, let's transition to the translation of the above explanation into Chinese.

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Active and Passive Sentences. A sentence is written in active voice when the subject of the sentence performs the action in the sentence. e.g. The girl was washing the dog. A sentence is written in passive voice when the subject of the sentence has an action done to it by someone or something else.read more >>