Step-by-step explanation:
Commas are used in various ways in English grammar, depending on the context and purpose of the sentence. Here are some general rules and examples of where to use a comma:
To separate items in a list:
I need to buy bread, milk, and eggs.
To separate two independent clauses joined by a coordinating conjunction (and, but, or, nor, for, yet, so):
I like to read, but my brother prefers to watch TV.
She studied hard, so she passed the exam.
To separate introductory words or phrases:
In my opinion, this is the best book I've ever read.
After finishing her homework, she went to bed.
To set off nonessential information or clauses:
The book, which I read last week, was very interesting.
John, who is my neighbor, is a doctor.
To separate two adjectives that modify the same noun:
She has beautiful, long hair.
Remember, there are many other situations where a comma is appropriate. However, it is important to use them correctly to avoid changing the meaning of a sentence or creating ambiguity.