Compound and Complex Sentences Worksheet Generator
Make printable compound and complex sentences worksheets in seconds. Students identify simple, compound, and complex sentences, find independent and dependent clauses, choose the conjunction that joins clauses, combine two short sentences, complete sentences, and fix comma or conjunction errors — building sentence structure with coordinating and subordinating conjunctions. Pick a focus, sentence set, and difficulty, or paste your own sentences, then print or download a clean PDF with an answer key. Free, no sign-up, and everything stays in your browser.
PDF puts the answer key on its own page.
Compound and Complex Sentences Worksheet
Mixed review · Mixed sentence structure practice
Name: ______________________ Date: ____________
Read each sentence, then answer about its structure.
- 1.
Is this sentence simple, compound, or complex?
Maya packed her notebook, but she forgot her pencil.
- A)Compound
- B)Simple
- C)Complex
- 2.
Is this sentence simple, compound, or complex?
When the bell rang, the students lined up.
- A)Compound
- B)Complex
- C)Simple
- 3.
Is this sentence simple, compound, or complex?
You can borrow the book if you return it.
- A)Compound
- B)Simple
- C)Complex
- 4.
Is this sentence simple, compound, or complex?
It was cold outside, so we wore our jackets.
- A)Simple
- B)Complex
- C)Compound
- 5.
Is this sentence simple, compound, or complex?
Maya finished her reading log.
- A)Complex
- B)Compound
- C)Simple
- 6.
Is this sentence simple, compound, or complex?
The bakery smelled wonderful this morning.
- A)Simple
- B)Compound
- C)Complex
- 7.
Is this sentence simple, compound, or complex?
We cleaned the room after the party ended.
- A)Compound
- B)Simple
- C)Complex
- 8.
Is this sentence simple, compound, or complex?
If the rain stops, we will have recess.
- A)Complex
- B)Simple
- C)Compound
- 9.
Is this sentence simple, compound, or complex?
The museum was busy, but we found a quiet corner.
- A)Simple
- B)Compound
- C)Complex
- 10.
Is this sentence simple, compound, or complex?
The plants needed water, so we filled the cans.
- A)Compound
- B)Complex
- C)Simple
Answer key
- 1.A) Compound — This is a compound sentence because two independent clauses are joined by but.
- 2.B) Complex — This is a complex sentence because the dependent clause begins with when.
- 3.C) Complex — This is a complex sentence because the dependent clause begins with if.
- 4.C) Compound — This is a compound sentence because two independent clauses are joined by so.
- 5.C) Simple — This is a simple sentence because it has one independent clause.
- 6.A) Simple — This is a simple sentence because it has one independent clause.
- 7.C) Complex — This is a complex sentence because the dependent clause begins with after.
- 8.A) Complex — This is a complex sentence because the dependent clause begins with if.
- 9.B) Compound — This is a compound sentence because two independent clauses are joined by but.
- 10.A) Compound — This is a compound sentence because two independent clauses are joined by so.
Answer Key · Compound and Complex Sentences Worksheet
Mixed review · Mixed sentence structure practice
- 1.A) Compound — This is a compound sentence because two independent clauses are joined by but.
- 2.B) Complex — This is a complex sentence because the dependent clause begins with when.
- 3.C) Complex — This is a complex sentence because the dependent clause begins with if.
- 4.C) Compound — This is a compound sentence because two independent clauses are joined by so.
- 5.C) Simple — This is a simple sentence because it has one independent clause.
- 6.A) Simple — This is a simple sentence because it has one independent clause.
- 7.C) Complex — This is a complex sentence because the dependent clause begins with after.
- 8.A) Complex — This is a complex sentence because the dependent clause begins with if.
- 9.B) Compound — This is a compound sentence because two independent clauses are joined by but.
- 10.A) Compound — This is a compound sentence because two independent clauses are joined by so.
How to use the compound & complex sentences worksheet generator
- 1Choose a practice focus, sentence set, and difficulty, or paste your own sentences.
- 2Pick a question format: identify the type, identify a clause, choose a conjunction, combine, complete, fix, or mixed.
- 3Set how many questions, then toggle the name line, instructions, and answer key.
- 4Press Regenerate for a fresh set, then print or download a PDF with the answer key.
When this is useful
Simple, compound, and complex
Clear sentences give students focused practice labeling each sentence by its structure.
Independent and dependent clauses
Students find the complete thought and the clause that cannot stand alone, like because it was raining.
Combine sentences
The combine format builds stronger writing by joining two short sentences into one compound or complex sentence.
Fix sentence structure
The fix format asks students to correct a missing comma or the wrong conjunction and rewrite the sentence.
ELL and language support
Identify and choose formats help multilingual learners see how clauses connect into longer sentences.
Your own sentences
Paste your own sentences so the practice matches your class writing or a recent lesson.
Examples to try
An identify-the-type worksheet
Use the identify format so students label each sentence as simple, compound, or complex.
A clause-identification worksheet
Use the clause format so students write the independent or dependent clause from each sentence.
A choose-the-conjunction worksheet
Use the choose format so students pick the conjunction that joins the two clauses.
A combine-sentences worksheet
Use the combine format so students join two short sentences into one.
A fix-the-sentence worksheet
Use the fix format so students correct a comma or conjunction error and rewrite the sentence.
A worksheet from your own sentences
Paste sentences, or simple sentence = compound lines, to match your class.
Tips for better results
Start with simple vs compound
The simple vs compound focus and beginner difficulty keep early practice on one clause versus two.
Find the complete thought
Remind students that an independent clause is a complete thought, while a dependent clause is not.
Watch the joining word
Show that a coordinating conjunction joins a compound sentence and a subordinator begins a complex one.
Mind the comma
Point out the comma before a coordinating conjunction and after an introductory dependent clause.
Print the answer key separately
The PDF puts the answer key on its own page, so you can keep it apart from the student copy.
Pair it with grammar tools
Follow with a conjunctions worksheet or a sentence types worksheet for more sentence practice.
How the compound & complex sentences worksheet generator works
Built-in worksheets use original, classroom-safe sentences written for this tool. Each item pairs a sentence with its structure label, its independent and dependent clauses, the conjunction that joins them, and a short explanation, so the answer key is always defensible. A simple sentence has one independent clause, a compound sentence joins two independent clauses with a coordinating conjunction and a comma, and a complex sentence adds a dependent clause with a subordinator — and each sentence fits one label clearly, so there is never more than one right answer.
Identify-the-type questions have one deterministic answer, and choose-the-conjunction questions use hand-picked distractors that are clearly wrong in that sentence, so there is exactly one correct answer with no duplicate choices. The clause, combine, complete, and fix formats give students room to write, with combine showing two short sentences and a target structure, and fix showing a clear comma or conjunction error to correct. Custom items let you bring your own; the type is normalized or safely inferred from clear clause structure only, and when a custom item lacks enough clause data it uses a teacher-check sample instead of inventing one.
Everything is generated on your device. Press Regenerate for a fresh set from the same options, and print or save a clean PDF, instantly and for free. Your custom sentences and settings never leave your browser.
Private by design
- No account and no sign-up. Just open it and start.
- Everything runs on your device, so the worksheet settings you choose and any sentences you paste stays with you.
- Nothing you create is uploaded. No values, names, scores, or generated content are sent to our servers.
- We use Google Analytics only for basic, anonymous pageview counts. It never receives what you enter into the tool.
Frequently asked questions
Is this compound and complex sentences worksheet generator free?
Yes, completely free, with no account and no limit on how many worksheets you make. There's no watermark on the printed worksheet.
Can I print the worksheet?
Yes. Use the Print button to send the worksheet straight to your printer. Only the worksheet prints, with the sentences and questions, and nothing else from the web page.
Can I download a PDF?
Yes. Download a clean PDF built right on your device, with the worksheet on the first pages and, when enabled, an answer key on its own page.
Can students practice simple, compound, and complex sentences?
Yes. The identify format asks students to label each sentence as simple, compound, or complex, and the focus options let you mix or separate the types.
Can students identify independent and dependent clauses?
Yes. The clause format asks students to write the independent clause, the complete thought, or the dependent clause that cannot stand alone.
Can students combine sentences?
Yes. The combine format shows two short sentences and a target structure, and students join them into one compound or complex sentence.
Can I use custom sentences?
Yes. Switch to custom and paste your own items, using labels or simple sentence = compound lines. Your sentences stay in your browser and are never saved or uploaded.
Does this use AI, and are my custom sentences saved?
No. This is a browser-only worksheet builder. It does not use AI to write sentences or decide answers, and nothing you type is stored or sent anywhere.
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