Grade 3 worksheet on simple and compound sentences from K5 Learning.

Task Overview:

The task is to identify whether each sentence is a simple sentence (S) or a compound sentence (C). A simple sentence contains only one independent clause, while a compound sentence contains two or more independent clauses joined by a coordinating conjunction (e.g., "and," "but," "so," "or," "nor," "for," "yet").

Solution and Explanation:

#### 1. Clocks go forward in the spring.
- Type: Simple Sentence (S)
- Explanation: This sentence has only one independent clause: "Clocks go forward in the spring." There are no coordinating conjunctions joining multiple clauses.

#### 2. They left early, so they arrived first.
- Type: Compound Sentence (C)
- Explanation: This sentence has two independent clauses: "They left early" and "they arrived first," joined by the coordinating conjunction "so."

#### 3. Danny practices the guitar every day.
- Type: Simple Sentence (S)
- Explanation: This sentence has only one independent clause: "Danny practices the guitar every day." There are no coordinating conjunctions joining multiple clauses.

#### 4. They did not brush their teeth, nor did they comb their hair.
- Type: Compound Sentence (C)
- Explanation: This sentence has two independent clauses: "They did not brush their teeth" and "they did not comb their hair," joined by the coordinating conjunction "nor."

#### 5. This building has several elevators and stairwells.
- Type: Simple Sentence (S)
- Explanation: This sentence has only one independent clause: "This building has several elevators and stairwells." The word "and" here is used as a conjunction within a single clause, not to join two independent clauses.

#### 6. We took the city bus, but it was crowded.
- Type: Compound Sentence (C)
- Explanation: This sentence has two independent clauses: "We took the city bus" and "it was crowded," joined by the coordinating conjunction "but."

#### 7. Some grocery stores are open on Sundays.
- Type: Simple Sentence (S)
- Explanation: This sentence has only one independent clause: "Some grocery stores are open on Sundays." There are no coordinating conjunctions joining multiple clauses.

#### 8. I did not eat any cookies, yet there are none left.
- Type: Compound Sentence (C)
- Explanation: This sentence has two independent clauses: "I did not eat any cookies" and "there are none left," joined by the coordinating conjunction "yet."

#### 9. The ferry does not operate at night.
- Type: Simple Sentence (S)
- Explanation: This sentence has only one independent clause: "The ferry does not operate at night." There are no coordinating conjunctions joining multiple clauses.

#### 10. He finished his book, and he has nothing left to read.
- Type: Compound Sentence (C)
- Explanation: This sentence has two independent clauses: "He finished his book" and "he has nothing left to read," joined by the coordinating conjunction "and."

#### 11. The birds are singing in the trees and the bushes.
- Type: Simple Sentence (S)
- Explanation: This sentence has only one independent clause: "The birds are singing in the trees and the bushes." The word "and" here is used as a conjunction within a single clause, not to join two independent clauses.

#### 12. They do not fear ghosts, nor do they fear monsters.
- Type: Compound Sentence (C)
- Explanation: This sentence has two independent clauses: "They do not fear ghosts" and "they do not fear monsters," joined by the coordinating conjunction "nor."

Final Answer:

```
1. S
2. C
3. S
4. C
5. S
6. C
7. S
8. C
9. S
10. C
11. S
12. C
```

Boxed Final Answer:
$$
\boxed{S, C, S, C, S, C, S, C, S, C, S, C}
$$