Grammar worksheet designed to help students distinguish between simple and compound sentence structures.

To determine if each sentence is simple or compound, we need to look for two things:
1. Simple Sentence: Has one independent clause (one complete thought with a subject and a verb). It might have a compound subject or compound verb, but it doesn't join two separate complete sentences.
2. Compound Sentence: Has two independent clauses joined by a coordinating conjunction (like *and, but, or, so*) usually with a comma before the conjunction.

Let's go through each sentence step by step:

1. "I ate two bowls of noodles, then I had hungry."
* Clause 1: "I ate two bowls of noodles" (Complete thought)
* Clause 2: "then I had hungry" (Note: "had hungry" is grammatically unusual, likely meant "was hungry", but structurally it acts as a second subject-verb pair here). The word "then" acts as a connector between two actions in time. However, strictly speaking, "then" is an adverb, not a coordinating conjunction. But in many elementary exercises, if there are two distinct subjects doing things separated by a comma and a transition word like "then," it is often treated as compound because it joins two events. Let's look closer. Actually, looking at standard grammar rules taught at this level: A compound sentence needs a FANBOYS conjunction (For, And, Nor, But, Or, Yet, So). "Then" is not a FANBOYS conjunction. However, sometimes "and then" is used. Here it is just "then". Let's re-read carefully. "I ate... , then I had..." This is technically a comma splice if "then" isn't a conjunction. But in the context of these worksheets, they often look for two subjects and two verbs. Let's look at the other options to gauge the strictness.
* Let's re-evaluate based on common school worksheet logic. Often, sentences with two independent clauses connected by *any* linking word including "then" (implying "and then") are marked compound. Let's hold this one. Let's look at #2.

2. "The match has been canceled."
* Subject: The match
* Verb: has been canceled
* One complete thought. No conjunction joining another sentence.
* Type: Simple

3. "Everyone was busy, so they went to the park alone."
* Clause 1: "Everyone was busy" (Complete thought)
* Conjunction: ", so"
* Clause 2: "they went to the park alone" (Complete thought)
* Two independent clauses joined by a coordinating conjunction.
* Type: Compound

4. "Ryan is participating in a race."
* Subject: Ryan
* Verb: is participating
* One complete thought.
* Type: Simple

5. "Dogs are very friendly, and they are very loyal too."
* Clause 1: "Dogs are very friendly" (Complete thought)
* Conjunction: ", and"
* Clause 2: "they are very loyal too" (Complete thought)
* Two independent clauses joined by a coordinating conjunction.
* Type: Compound

6. "The crime is extremely heavy."
* Subject: The crime
* Verb: is
* One complete thought.
* Type: Simple

7. "We were frightened by darkness, but we continued to move."
* Clause 1: "We were frightened by darkness" (Complete thought)
* Conjunction: ", but"
* Clause 2: "we continued to move" (Complete thought)
* Two independent clauses joined by a coordinating conjunction.
* Type: Compound

8. "The ship was anchored 20 miles away from the shore."
* Subject: The ship
* Verb: was anchored
* One complete thought.
* Type: Simple

9. "Adam was hiding behind the door, so Sarah didn’t notice him."
* Clause 1: "Adam was hiding behind the door" (Complete thought)
* Conjunction: ", so"
* Clause 2: "Sarah didn’t notice him" (Complete thought)
* Two independent clauses joined by a coordinating conjunction.
* Type: Compound

10. "Ingeer is happy as a princess."
* Subject: Ingeer
* Verb: is
* One complete thought. ("as a princess" is a phrase describing how happy, not a new clause).
* Type: Simple

*Re-evaluating #1:* "I ate two bowls of noodles, then I had hungry."
In many lower-grade grammar contexts, if a sentence has two subjects ("I", "I") and two verbs ("ate", "had") separated by a comma and a time word like "then", it is frequently categorized as compound because it expresses two sequential main ideas, even though "then" is technically an adverb. Given the pattern of the other questions (clear simple vs clear compound with FANBOYS), this is the trickiest one. However, without a FANBOYS conjunction, it's technically a run-on/comma splice. But usually, in these multiple-choice worksheets, if it looks like two sentences stuck together, it's "Compound". Let's assume the worksheet considers "then" functioning like "and then". Therefore, it connects two independent clauses.
*Alternative view:* If the curriculum is strict about FANBOYS, it might be considered simple with a compound predicate? No, "I ate... then I had..." has two subjects. It's two clauses. Between Simple and Compound, Compound is the intended answer for "two clauses joined together".

Let's double check #1 again. Is it possible it's simple? "I ate... and had..." would be simple. But it says "I ate..., then I had...". The repetition of the subject "I" makes it two clauses. So, Compound is the best fit among the choices provided for a student worksheet.

Final Check:
1. Compound (Two clauses: I ate / I had)
2. Simple (One clause)
3. Compound (Two clauses joined by 'so')
4. Simple (One clause)
5. Compound (Two clauses joined by 'and')
6. Simple (One clause)
7. Compound (Two clauses joined by 'but')
8. Simple (One clause)
9. Compound (Two clauses joined by 'so')
10. Simple (One clause)

Final Answer:
1. compound
2. simple
3. compound
4. simple
5. compound
6. simple
7. compound
8. simple
9. compound
10. simple