Sentence in the Passive Voice:
The sentence "I was offered a job by the company" is an example of a sentence in the passive voice.

Explanation:
To understand why the sentence is in the passive voice, let's first define what passive voice is. In English grammar, the passive voice is a construction in which the subject of a sentence is the receiver of the action rather than the doer. In other words, the focus is on the recipient or the object of the action rather than the person or thing performing the action.

Here is a breakdown of the sentence:

Subject: I
Verb: was offered
Object: a job
Agent: by the company

The subject of the sentence is "I," but it is not performing the action. Instead, it is receiving the action of being offered a job. The verb "was offered" is in the passive voice because it emphasizes the action on the subject rather than the subject performing the action.

Importance of Passive Voice:
The passive voice is often used to shift the focus of the sentence from the doer of the action to the recipient or to emphasize the object of the action. This can be useful in various contexts, such as:

1. When the doer of the action is unknown or unimportant: The passive voice allows us to focus on what happened rather than who did it. In this case, the company offering the job is not as important as the fact that the job was offered.

2. When the doer of the action is obvious or implied: Sometimes, it is unnecessary to mention who performed the action because it is already clear from the context. In the sentence, it is implied that the company offered the job, so there is no need to explicitly state it.

3. When the writer wants to be more formal or objective: The passive voice can lend a more formal or objective tone to a sentence. In certain contexts, such as academic or scientific writing, this can be preferred.

In Summary:
The sentence "I was offered a job by the company" is an example of a sentence in the passive voice because the subject is the receiver of the action rather than the doer. The passive voice is used to shift the focus onto the object of the action or when the doer is unknown or unimportant.