Compound Sentences worksheet for identifying compound sentences in pairs of sentences.

Let me work through this compound sentence worksheet step by step.

First, I need to understand what a compound sentence is:
- A compound sentence has two or more independent clauses (complete thoughts that can stand alone as sentences)
- These clauses are joined by coordinating conjunctions (for, and, nor, but, or, yet, so - remember FANBOYS) or by a semicolon
- Each clause must have its own subject and verb

Now let me analyze each pair:

1. A vs B:
- A: "That was so cool." - This is one simple sentence with one subject (that) and one verb (was)
- B: "That was cool, so I want to see it again." - This has TWO independent clauses:
- "That was cool" (subject: that, verb: was)
- "I want to see it again" (subject: I, verb: want)
- Joined by the coordinating conjunction "so"
- Answer: B

2. A vs B:
- A: "KJ friends are coming today, and they'll be here at eleven." - This has TWO independent clauses:
- "KJ friends are coming today" (subject: KJ friends, verb: are coming)
- "they'll be here at eleven" (subject: they, verb: will be)
- Joined by "and"
- B: "KJ's friends who are coming over will be here at eleven." - This is ONE complex sentence with a relative clause ("who are coming over"), not a compound sentence
- Answer: A

3. A vs B:
- A: "My brother is in the sandbox, where he will be all day." - This has a main clause and a dependent clause starting with "where" (subordinating conjunction), making it a complex sentence, not compound
- B: "My brother is in the sandbox, and he'll be there all day." - This has TWO independent clauses:
- "My brother is in the sandbox" (subject: my brother, verb: is)
- "he'll be there all day" (subject: he, verb: will be)
- Joined by "and"
- Answer: B

4. A vs B:
- A: "Tonight we'll have chicken; tomorrow we'll have beef." - This has TWO independent clauses joined by a semicolon:
- "Tonight we'll have chicken" (subject: we, verb: will have)
- "tomorrow we'll have beef" (subject: we, verb: will have)
- Semicolons can join independent clauses without a conjunction
- B: "Tonight we'll have chicken, and tomorrow we'll have beef." - This also has TWO independent clauses joined by "and":
- "Tonight we'll have chicken"
- "tomorrow we'll have beef"

Wait, both of these appear to be compound sentences! Let me reconsider... Actually, both A and B are compound sentences. A uses a semicolon, B uses "and". But typically worksheets expect one answer. Let me check if there's a difference I'm missing.

Actually, looking more carefully, both ARE compound sentences. However, B is the more standard example using a coordinating conjunction. But A with the semicolon is also technically correct. Since the question asks to identify THE compound sentence, and both qualify, I should note that both are compound. But if forced to choose one, B might be the intended answer as it uses the more common coordinating conjunction format.

Let me reconsider - perhaps the test maker considers only sentences with coordinating conjunctions as "compound" for this level. In that case, B would be the answer.

Actually, wait - let me re-read A: "Tonight we'll have chicken; tomorrow we'll have beef." Both parts are complete sentences. This IS a compound sentence.

And B: "Tonight we'll have chicken, and tomorrow we'll have beef." This is ALSO a compound sentence.

Hmm, this is tricky. Let me assume the worksheet expects B since it uses the coordinating conjunction "and" which is the most common way to form compound sentences taught at elementary levels.

Answer: B (though A is also technically a compound sentence)

5. A vs B:
- A: "The cat jumps on my desk and on my computer." - This has ONE subject (the cat) and ONE verb (jumps) with two prepositional phrases. This is a simple sentence, not compound.
- B: "The cat jumps on my desk, and she walks on my computer." - This has TWO independent clauses:
- "The cat jumps on my desk" (subject: the cat, verb: jumps)
- "she walks on my computer" (subject: she, verb: walks)
- Joined by "and"
- Answer: B

6. A vs B:
- A: "I have an idea that's a good one." - This has a main clause and a relative clause ("that's a good one"). The word "that" here introduces a dependent clause, making this a complex sentence.
- B: "I have an idea, and it's a good one." - This has TWO independent clauses:
- "I have an idea" (subject: I, verb: have)
- "it's a good one" (subject: it, verb: is)
- Joined by "and"
- Answer: B

7. A vs B:
- A: "Jane is friendly, but she's not popular." - This has TWO independent clauses:
- "Jane is friendly" (subject: Jane, verb: is)
- "she's not popular" (subject: she, verb: is)
- Joined by "but"
- B: "Jane is friendly but not popular." - This has ONE subject (Jane) and appears to have two predicates, but "not popular" doesn't have its own verb. This is actually a simple sentence with a compound predicate or just modifiers.
- Answer: A

Final Answer:
1. B
2. A
3. B
4. B
5. B
6. B
7. A