EnglishFreePrintable

Complex Sentence Building

A free english worksheet ready for your classroom. Open in Kuraplan to grab the print-ready PDF, customize it for your students, or generate a fresh version in seconds.

Complex Sentence Building worksheet preview
Complex Sentence Building

Complex Sentence Building

Complex sentences illustration

📚 Part 1: Meet the Conjunctions

Remember: Subordinating conjunctions help us join simple sentences into complex sentences!

  • because = shows cause (why something happens)
  • when = shows time (when something happens)
  • although = shows concession (despite something)
1. Circle the subordinating conjunction in each sentence:

a) We stayed inside because it was raining.

because
inside
raining

b) When the bell rang, we lined up quickly.

bell
when
quickly

c) Although she was tired, Emma finished her homework.

tired
although
homework

🔗 Part 2: Choose the Right Conjunction

2. Select the best subordinating conjunction to join each pair of sentences:

a) It was very hot. We went swimming.

because
when
although

b) The movie was scary. I enjoyed watching it.

because
when
although

c) The school holidays started. We travelled to Queensland.

because
when
although

✏️ Part 3: Build Complex Sentences

3. Combine these simple sentences into complex sentences using the conjunction in brackets:

a) We cancelled the picnic. It started raining heavily. (because)

b) The test was difficult. Sarah studied hard and passed. (although)

c) The final siren sounded. All the players celebrated. (when)

🏷️ Part 4: Label the Relationship Types

4. Read each complex sentence and tick the type of relationship shown:

a) Because the library was closed, we studied at home.

Cause
Time
Concession

b) When summer arrives, we'll go camping in the Blue Mountains.

Cause
Time
Concession

c) Although it was 35°C outside, we still played cricket.

Cause
Time
Concession

🔄 Part 5: Sentence Matching Challenge

5. Match each simple sentence pair with the correct subordinating conjunction:
1. The power went out. We used candles for light.
2. The team lost the match. They played their best.
3. School finished. We walked to the shops.
A. when
B. because
C. although

📝 Part 6: Paragraph Expansion

6. Rewrite this simple paragraph by combining some sentences using subordinating conjunctions:

Simple paragraph:
Yesterday was Sports Day. It was very sunny. We had lots of fun. Some events were cancelled. The wind was too strong. The teachers organised indoor activities. Everyone enjoyed the day.

Your complex paragraph:

🌟 Part 7: Creative Writing Challenge

7. Write 4 sentences about your weekend. Use each subordinating conjunction at least once (because, when, although):
8. Circle the subordinating conjunctions you used in your writing above.

About This Worksheet

Free in Kuraplan

Sign up free, grab the PDF, and customize it for your class.

Print-Ready

Formatted for standard paper. Clean layout, easy to read.

AI-Generated

Created with Kuraplan's AI, designed for real classroom use.

For Teachers & Parents

Use in classrooms, for homework, tutoring, or homeschool.

Need a custom version of this worksheet?

Kuraplan's AI generates custom worksheets in seconds — differentiated for every learner, aligned to your curriculum.

Generate Custom Worksheets — Free
No credit card Curriculum-aligned Under 60 seconds