Sentence Builder
Gallery showing simple to complex sentence progression.
Click to zoom
A complex sentence connects a strong independent block to a supporting dependent block.
Construct clear, accurate complex sentences using subordinating conjunctions and relative clauses.
Preview · progress not saved — Chapter 1 is free
Teach controlled use of subordinating conjunctions.
Many IELTS candidates lose marks because they try to write overly long, tangled sentences. They think "complex" means "hard to read."
In English grammar, a complex sentence is actually very simple: it is just one independent clause connected to one dependent clause.
Gallery showing simple to complex sentence progression.
A complex sentence connects a strong independent block to a supporting dependent block.
Arrange clauses into correct order.
Drag and drop the fragments to build a clear, coherent complex sentence. Notice how the connector acts as the starting block.
Fill in the correct subordinating conjunction depending on meaning.
Many students fail to achieve a high score in the writing task they do not plan their essays properly. memorised templates might seem like a quick fix, they often result in lower scores for coherence. A well-structured paragraph focuses on a single main idea, a poorly written one introduces too many confusing points. You should always leave time to review your work, allows you to catch minor grammatical errors. You will significantly improve your essay structure you practice outlining your arguments before writing.
Combine short sentences into one clear complex sentence.
Use a connector (subordinating conjunction or relative pronoun) to combine the ideas smoothly.
Identify which part of your new sentence can stand alone, and which part is dependent on the connector.