Complex Sentences & Subordination

Main and subordinate clauses

A main clause can stand alone.

A subordinate clause depends on another clause.

Although the evidence was limited, the researchers published the results.

Main clause: the researchers published the results.

Subordinate clause: Although the evidence was limited.

Cause and reason

Common subordinators include because, since and as.

The event was cancelled because the weather became dangerous.

Contrast and concession

Although, even though and while can introduce contrast.

Although the method is efficient, it has several limitations.

Concession allows a writer to acknowledge one point while maintaining another.

Condition

If, unless and provided that can express conditions.

The plan may succeed if sufficient funding is available.

Purpose

So that and in order that can express purpose.

The instructions were simplified so that more users could understand them.

Sentence focus

The placement of clauses affects emphasis.

Although the proposal is expensive, it could reduce long-term costs.

The proposal could reduce long-term costs, although it is expensive.

Both are grammatical, but the surrounding context may make one order more effective.

Complex does not mean overloaded

A sentence can contain several clauses and still be clear, but too many layers can make the structure difficult to follow.

If a sentence contains several separate claims, consider dividing it.

Basic: The policy is expensive. It may still be useful.

More precise: Although the policy is expensive, it may still be useful.

The subordinate clause makes the relationship between the two ideas explicit.

1. Identify the relationship between the ideas.
2. Decide which idea should be the main clause.
3. Choose a subordinator that expresses the relationship accurately.
4. Check punctuation and clause boundaries.
5. Read the sentence for clarity.
6. Split the sentence if the structure becomes difficult to follow.

Fragment

Incorrect: Although the results were promising.

Correct: Although the results were promising, further research was needed.

Wrong relationship

Do not choose a connector only because it sounds formal.

Use although for contrast, because for reason and if for condition.

Overloaded sentence

Several subordinate clauses can create unnecessary complexity.

Clarity is more important than sentence length.

Which sentence expresses concession most clearly?

• A. The evidence was limited because the conclusion remained useful.
• B. Although the evidence was limited, the conclusion remained useful.
• C. If the evidence was limited, the conclusion remained useful.
• D. The evidence was limited so that the conclusion remained useful.

Answer: B. Although signals that the second idea remains true despite the limitation in the first.

• Subordination shows relationships between ideas.
• Common relationships include cause, contrast, condition, purpose and concession.
• The main clause carries the central grammatical structure.
• Clause order can affect emphasis.
• Complex syntax should improve precision, not reduce clarity.