Grammar learning sequence · Step 31 of 38

Reason & Result Connectors

Reason connectors explain why something happens; result connectors explain what happens because of it. Because commonly introduces a reason, while so and therefore commonly introduce a result.

Understand the idea

What this grammar skill means

Children should first label the cause and the outcome, then choose a connector that matches the direction of the relationship. This supports both sentence accuracy and logical explanation.

Why this skill matters

Reason and result connectors help children make logic visible to the reader. This supports explanation, argument and paragraph cohesion because ideas are linked by cause and consequence rather than simply placed next to each other.

Core rules and patterns

Reason connectors explain why something happens; result connectors show what follows from a cause. Because and since can introduce reasons, while so, therefore and as a result can signal consequences in different structures.
Connector choice affects grammar and punctuation. Because usually introduces a dependent reason clause, while therefore is commonly an adverbial connector linking complete ideas rather than functioning like a coordinating conjunction.
Clear writing makes the logical relationship accurate. A connector should match the actual cause-and-effect relationship rather than simply making two sentences sound more formal.

See the rule in context

Worked examples

We stayed inside because the rain became heavier.

Because introduces the reason for staying inside.

The rain became heavier, so we stayed inside.

So connects the cause to its result in a coordinated structure.

The road was flooded. Therefore, the bus was delayed.

Therefore signals a result across two complete sentences and is punctuated as a linking adverb.

More examples

We stayed inside because it was raining.
It was raining, so we stayed inside.
The road was closed; therefore, the bus was delayed.

Common mistakes to watch

Using because and so redundantly in the same simple cause-result structure.
Reversing which idea is the reason and which is the result.
Using formal connectors without appropriate punctuation.

Watch for these

Tricky cases and useful distinctions

Because and because of use different structures: because introduces a clause, while because of is followed by a noun phrase or similar complement.
Therefore is not used exactly like so. It typically needs punctuation that reflects its adverbial role rather than being treated as a simple coordinating conjunction.

Try it

Short practice prompts

1.Label the reason and result in three pairs.
2.Rewrite because sentences using so.
3.Choose a connector that best matches the level of formality.

Questions parents often ask

Quick clarifications

Can because start a sentence?

Yes. A sentence can begin with a because-clause when the main clause follows and the whole structure is complete.

Are so and therefore interchangeable?

They can express a similar result relationship, but their grammatical role, register and punctuation differ.

Continue the grammar pathway

← Previous: Compound Sentences Next: Time & Sequence Connectors →

Conjunctions Compound Sentences

References and further reading

Sources used to check this grammar explanation

Tiny Steps writes the teaching explanation and examples independently. These references are provided for grammar definitions, usage patterns and further reading.

Conjunctions
Cambridge Dictionary
Reference for coordinating and other linking conjunctions.
English Grammar Today
Cambridge Dictionary
Broad grammar reference based on English Grammar Today and the Cambridge English Corpus.

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