This is especially true in the sentence “My life has been a roller coaster,” which, once you’ve learned, is pretty much the same sentence as “My life has been a roller coaster,” except with a comma. So, yes, that is a valid sentence, but it’s also a common one, and a comma is one of those things to learn.
Commas are one of those things to learn for people who write essays. In fact, they are one of those things to learn for people who work in the field of English as a second language. In English as a Second Language, commas are often needed for two different reasons. The first reason is to show that you understand that what you are writing is actually an essay. The second reason is to indicate that what you are writing is actually a sentence.
For example, the sentence “I saw a spider in a jar,” is not a sentence. A sentence is made up of words. Words are the basic units of language. But in English as a Second Language, commas are often used for the same purpose – to separate sentences which are not sentences. When students write essays, they can use commas to separate paragraphs that don’t really belong together.
I would say that you are writing a sentence because what you are writing is an essay. However, in many writing classes you will see sentences and paragraphs both written on paper and on a screen.
Although I don’t know how English professors do it, most of those essays end up being paragraphs because the writer has no idea how to make her paragraphs coherent. In English class, that’s called a paragraph and the writer is supposed to be able to understand why it is a paragraph. In this case, because it is a sentence and not a paragraph, I am going to call the writer’s sentence a comma.
Commas are a nice thing, especially when there are a lot of them, but they are only as good as the writer is able to identify and understand them. This means that if you are writing a story that is going to be published in a journal or maybe even a book, you will have to use commas where they are clearly not necessary.
Although it isn’t a comma, I’m going to call the sentence a comma because of the lack of a comma. I have no idea if you were trying to read a sentence, but it could have been a comma, but that is not what it said in the sentence.
A comma is a comma. And you know what, I don’t know if you were trying to read a sentence as well, but it could have been a comma, but you should know that.
The rules for using commas do not include the need to use commas where they are not needed, but they do include the use of commas where they are needed. You might have been using a comma where it wasnt needed in the sentence you read but you should know that this is not the case for all sentences.
A comma is an important part of writing. It is important because it is how we break up sentences. It is important because it adds clarity. It is important because it breaks up words and helps structure and organize a sentence. It is important because it is the only real punctuation and it controls how we read and write English.