Compound sentences Worksheet Practice Exercises with Answers

Lesson 47: Compound Sentences

Question 1. What is a compound sentence?
Answer: A compound sentence is made up of two or more sentences (clauses) joined by a coordinating conjunction. Most commonly, the coordinating conjunctions are "and," "or," and "but." Four less common ones are "for," "so," "yet," and "nor." Each of the sentences within a compound sentence must contain its own subject and verb phrase, just as a simple sentence does.
In simple words: A compound sentence combines two or more complete sentences using words like "and," "or," or "but." Each part of the compound sentence can stand alone as its own sentence.

Exam Tip: Remember FANBOYS - the first letter of each coordinating conjunction (For, And, Nor, But, Or, Yet, So) helps you identify what joins compound sentences together.

Question 2. What is the difference between a compound sentence and a simple sentence?
Answer: A simple sentence contains just one complete sentence with one subject and one verb phrase. A compound sentence contains at least two complete sentences joined by a coordinating conjunction. You cannot tell if a sentence is simple or compound by how long it is - you must check whether it contains one or more than one complete sentence within it. For example, "The tall man with the violin case quickly climbed the stairs to the abandoned warehouse near the railroad tracks" is a simple sentence because it has just one subject and one verb, even though it is long. In contrast, "John laughed and Mary cried" is a compound sentence because it contains two complete sentences that can stand alone: "John laughed" and "Mary cried."
In simple words: Length does not tell you if a sentence is simple or compound. What matters is counting how many complete sentences are inside it. One complete sentence equals simple. Two or more complete sentences joined together equals compound.

Exam Tip: Always check both sides of the conjunction - if there is a complete sentence on each side, it is compound; if only one side forms a complete sentence, it is simple.

Question 3. What is the difference between a compound sentence and a compound phrase?
Answer: A compound phrase is not the same thing as a compound sentence. In a compound phrase, the conjunction joins two phrases (like noun phrases) rather than two complete sentences. For example, in the sentence "The teacher graded the students' exams and their papers," the word "and" joins two noun phrases: "the students' exams" and "their papers." The phrase "their papers" is not a complete sentence by itself, so this is a simple sentence with a compound noun phrase, not a compound sentence. In a true compound sentence, there must be a complete sentence on either side of the conjunction.
In simple words: Compound phrases join word groups that cannot stand alone. Compound sentences join complete sentences that could stand alone if separated. Look at what the conjunction connects to tell them apart.

Exam Tip: Test each side of the conjunction by asking: "Can this side stand alone as a complete sentence?" If yes on both sides, it is compound; if no, it is compound phrase or simple.

Question 4. Can a compound sentence contain more than two sentences?
Answer: Yes, a compound sentence can contain more than two sentences. For example, the sentence "Nora was Zach's stepmother but she treated him like her other children and he trusted her completely" contains three sentences: (1) Nora was Zach's stepmother, (2) she treated him like her other children, and (3) he trusted her completely. In fact, a compound sentence can contain any number of sentences, though writers usually limit themselves to just a few. For instance, "He turned his head away and he pretended to ignore her but he continued to listen to her and in fact he hung on her every word" contains four sentences or clauses joined together.
In simple words: You can join three, four, or even more complete sentences together using multiple coordinating conjunctions. As long as each part is a complete sentence and they are connected by coordinating conjunctions, it is still called one compound sentence.

Exam Tip: When you see multiple coordinating conjunctions like "and," "but," and "or" in one sentence, count how many complete sentences are connected - this tells you the number of clauses in the compound sentence.

Test Yourself 47.1 - Underline Each Sentence in the Compound Sentence

Question 1. Andre pulled the car into the street, and Beth began reading the directions.
Answer: Underline: "Andre pulled the car into the street" and "Beth began reading the directions."
In simple words: The first sentence is about Andre pulling the car. The second sentence is about Beth reading the directions. These two complete sentences are joined by "and."

Exam Tip: Find the coordinating conjunction first, then look at what comes before it and what comes after it - each side should be a complete sentence.

Question 2. She enjoyed shopping for food, but she especially enjoyed cooking.
Answer: Underline: "She enjoyed shopping for food" and "she especially enjoyed cooking."
In simple words: The first complete sentence tells what she enjoyed. The second complete sentence contrasts this with what she enjoyed even more. The word "but" shows the contrast between the two ideas.

Exam Tip: Pay attention to the meaning of the conjunctions - "but" introduces a contrast, while "and" simply joins equal ideas.

Question 3. I can do this now, or I can do it later.
Answer: Underline: "I can do this now" and "I can do it later."
In simple words: The first complete sentence presents one choice. The second complete sentence presents another choice. The word "or" shows that these are two possible options to pick from.

Exam Tip: The conjunction "or" shows you that there are alternatives or choices presented in the compound sentence.

Question 4. Dan does not feel well, yet he wants to go in to work.
Answer: Underline: "Dan does not feel well" and "he wants to go in to work."
In simple words: The first complete sentence tells his condition. The second complete sentence tells what he wants to do anyway. The word "yet" shows that his action is surprising given his condition.

Exam Tip: "Yet" and "but" both show contrast - use the context to decide which one fits the relationship between the two sentences.

Question 5. We missed our flight, so we have to wait around the airport for the next available one.
Answer: Underline: "We missed our flight" and "we have to wait around the airport for the next available one."
In simple words: The first complete sentence tells what happened. The second complete sentence tells the result or consequence. The word "so" connects a cause to its effect.

Exam Tip: The conjunction "so" indicates a cause-and-effect relationship - the first clause causes the second clause to happen.

Test Yourself 47.2 - Identify Whether Each Sentence Is Simple or Compound

Question 1. He can't blame her for the problem.
Answer: Simple
In simple words: This sentence has only one subject and one verb phrase. It is one complete thought, not two joined together.

Exam Tip: Look for a coordinating conjunction - if there is none, the sentence is simple.

Question 2. Beth left the library, and she headed straight home.
Answer: Compound
In simple words: This sentence contains two complete sentences joined by "and." The first is about Beth leaving the library. The second is about her heading home.

Exam Tip: When you find "and," "or," "but," or another coordinating conjunction connecting two complete sentences, mark it as compound.

Question 3. He was watching her, but she was pretending not to notice.
Answer: Compound
In simple words: This sentence has two complete sentences joined by "but." One sentence is about him watching. The other is about her pretending not to notice. These two ideas contrast with each other.

Exam Tip: "But" always signals a contrast between two complete sentences - if you see "but," check both sides for complete sentences.

Question 4. We like him a lot.
Answer: Simple
In simple words: This sentence has only one subject and one verb phrase. No coordinating conjunction joins two complete sentences here.

Exam Tip: Short sentences are often simple, but always check for complete sentences on both sides of any conjunction before deciding.

Question 5. The coach wants to win, but he will be happy with a tie.
Answer: Compound
In simple words: This sentence joins two complete sentences with "but." The first tells what the coach wants. The second tells what will make him happy. These ideas show a contrast or balance.

Exam Tip: Count the number of independent clauses (complete sentences) - one equals simple, two or more equals compound.

Test Yourself 47.3 - Identify the Number of Clauses and Underline Each One

Question 1. Vicki was always looking at herself in the mirror, but Mary Ann was extremely self-confident, and she never gave herself a second glance.
Answer: This sentence has 3 clauses. Underline: "Vicki was always looking at herself in the mirror," "Mary Ann was extremely self-confident," and "she never gave herself a second glance."
In simple words: This compound sentence contains three complete thoughts joined by two coordinating conjunctions: "but" and "and." Each clause describes a different person's behavior or attitude.

Exam Tip: Count each coordinating conjunction and add one to find how many clauses you have - two "but/and" mean three clauses.

Question 2. Her father was devoted to her.
Answer: This sentence has 1 clause.
In simple words: This is a simple sentence with just one complete thought. It has one subject and one verb phrase.

Exam Tip: If you find no coordinating conjunction, the sentence is simple and contains only one clause.

Question 3. Our firm's CEO will be flying to Chicago next week, but he'll be returning the same day.
Answer: This sentence has 2 clauses. Underline: "Our firm's CEO will be flying to Chicago next week" and "he'll be returning the same day."
In simple words: This compound sentence has two complete sentences joined by "but." The first tells about the trip out. The second tells about the return trip.

Exam Tip: The word "but" signals contrast - it joins two complete sentences that have different or opposing ideas.

Question 4. The lady in the elegant blue dress entered the well-lit room with her perky little dog in her arms.
Answer: This sentence has 1 clause.
In simple words: Even though this sentence is long and has many describing words, it tells only one main idea. It has one subject and one verb. Length does not make a sentence compound.

Exam Tip: A long sentence with lots of descriptive phrases can still be simple - always look for the number of complete sentences inside, not the length.

Question 5. Our boat was hit with strong winds, and we had to return to our cabins.
Answer: This sentence has 2 clauses. Underline: "Our boat was hit with strong winds" and "we had to return to our cabins."
In simple words: This compound sentence has two complete sentences joined by "and." The first tells what happened. The second tells what resulted from that event.

Exam Tip: "And" joins two equal or related ideas - look for a complete sentence on each side of it.

Test Yourself 47.4 - Decide if Each Sentence Is Simple or Compound

Question 1. It was a scene of joy but one thing spoiled the moment.
Answer: Compound
In simple words: This sentence has "but" connecting two complete sentences. The first describes the scene. The second tells what went wrong. "But" shows the contrast between these two ideas.

Exam Tip: Always test both sides of a conjunction - if each side can stand alone as a complete sentence, it is compound.

Question 2. The boxer fell to his knees but he managed to get back up.
Answer: Compound
In simple words: This sentence joins two complete sentences with "but." The first tells what happened to the boxer. The second tells what he did next. These contrasting ideas are connected by "but."

Exam Tip: "But" always marks a contrast - check that you have complete sentences on both sides to confirm the sentence is compound.

Question 3. The designer and his assistants quickly brought order to the chaos.
Answer: Simple
In simple words: This sentence has a compound subject (the designer and his assistants), but it is still just one complete sentence with one verb. The "and" joins two nouns, not two complete sentences.

Exam Tip: Watch out for compound subjects or objects - these joined by "and" are still simple sentences, not compound sentences.

Question 4. Matt was driving to New York with his kids and his neighbor's son.
Answer: Simple
In simple words: This sentence has "and" joining two noun phrases (his kids and his neighbor's son), not two complete sentences. It has one subject and one verb, so it is simple.

Exam Tip: Remember the difference between compound phrases and compound sentences - "and" can join phrases in a simple sentence.

Question 5. I like to drink coffee or tea after dinner.
Answer: Simple
In simple words: This sentence has "or" joining two nouns (coffee or tea), not two complete sentences. It has one subject and one verb, making it a simple sentence.

Exam Tip: Check what the conjunction connects - if it links noun phrases or verb phrases within one sentence, the sentence is still simple.