Final answer:
The subject of a sentence is the part that tells who or what the sentence is about. It is usually a noun, pronoun, or noun phrase. The subject is the doer or the main character, and the verb expresses the action, occurrence, or state of being.
Step-by-step explanation:
When discussing what are the parts of a sentence, we typically refer to the subject and the predicate as the main components. The subject is the person, place, thing, or idea that is doing or being something in the sentence. For example: 'Kelly walked down the street.' In this sentence, 'Kelly' is the subject as she is the one performing the action of walking. The predicate, on the other hand, includes the verb and tells us what the subject is doing or describes its state of being, such as 'walked down the street' in the previous example.
Subjects are often nouns or pronouns, and it's essential they agree in number with their verb; singular subjects take singular verbs, while plural subjects require plural verbs. Pronouns must also be in the correct case, such as subjective for subjects ('I like pizza.') or objective for objects ('Laura gave him the baseball.').
Understanding how a sentence is structured with a proper subject and verb agreement helps make writing clear and effective. It is also important to recognize noun phrases that can act as a subject, as in the sentence 'That tall woman jogged.', where 'That tall woman' is the subject noun phrase.
Your question is incomplete, but most probably your full question was
What are the parts of a sentence? Explain briefly with an example.
a. Subject