Write three sentences, each using a comma in a different way. Explain why the comma is needed in each sentence (4 points)

1. I visited my grandmother, who lives in the countryside, last summer. (Comma needed for nonrestrictive clause)

The comma is needed after "grandmother" to separate the nonrestrictive clause "who lives in the countryside" from the main sentence. The clause is not essential for the sentence's meaning, as it only provides additional information.

2. Jack is reading a book on psychology, and Jill is studying for her math exam. (Comma needed to separate items in a list)
The comma is needed after "psychology" to separate the two items in the list: "reading a book on psychology" and "studying for her math exam." The comma helps clarify that both Jack and Jill are engaged in separate activities.

3. Despite the heavy rain, the tennis match continued as scheduled. (Comma needed for introductory phrase)
The comma is needed after "rain" to separate the introductory phrase "Despite the heavy rain" from the main sentence. The comma indicates that the phrase sets the context for the rest of the sentence and helps avoid misinterpretation.

In few sentences

1. Carlos, my best friend, will be visiting next week. (Comma needed for appositive)

The comma is needed after "Carlos" to set off the appositive phrase "my best friend" which provides additional information about Carlos.

2. I can't go to the party, I have a prior commitment. (Comma needed for coordinating conjunction in compound sentence)
The comma is needed before the coordinating conjunction "I" to separate the two independent clauses in the compound sentence. It helps indicate a pause and clarity in the sentence structure.

3. After finishing work, Maria went for a run. (Comma needed for dependent clause)
The comma is needed after "work" to separate the dependent clause "After finishing work" from the main clause. It helps show the relationship between the two clauses and avoid confusion.

1. "I walked to the store, bought some groceries, and returned home." In this sentence, the comma is needed to separate the different actions (walking, buying, and returning) in a series.

2. "John, my oldest brother, just got promoted at work." Here, the comma is needed to set off the appositive phrase "my oldest brother," which provides additional information about John.
3. "After finishing her meal, Lisa decided to go for a walk." The comma is needed here to separate the dependent clause "After finishing her meal" from the main clause "Lisa decided to go for a walk."