Using commas correctly

Before they found their seats, the first match had already begun.

It was a close game, and they weren't disappointed by the final score.

They had come to cheer for Antonio Fergas, and he was the winner.

Although his opponent was very good, Fergas never missed returning a serve.

All are correct.

In the provided sentences, the placement of commas appears to be correct. Here is an explanation of why commas are used in each sentence:

1. "Before they found their seats, the first match had already begun."
- A comma is used after the introductory phrase "Before they found their seats" to separate it from the main clause "the first match had already begun." This helps clarify the sequence of events.

2. "It was a close game, and they weren't disappointed by the final score."
- A comma is used to separate the two independent clauses "It was a close game" and "they weren't disappointed by the final score." This creates a clear distinction between the different ideas expressed in the sentence.

3. "They had come to cheer for Antonio Fergas, and he was the winner."
- A comma is used before the coordinating conjunction "and" to separate the two independent clauses "They had come to cheer for Antonio Fergas" and "he was the winner." The comma helps indicate the pause before connecting both thoughts.

4. "Although his opponent was very good, Fergas never missed returning a serve."
- A comma is used after the dependent clause "Although his opponent was very good" to separate it from the main clause "Fergas never missed returning a serve." This helps show the contrast or condition presented in the sentence.

Remember, commas are used for various purposes, such as separating items in a list, setting off introductory phrases or clauses, separating independent clauses in compound sentences, and indicating pauses or clarifying meaning. It's important to understand the specific rules and guidelines for comma usage in different contexts.