B2 · Upper Intermediate

Because, So & Therefore: The Cause Chain

The chain of cause and result: because opens the reason, so connects the result, therefore announces it formally, due to adds a noun.

01

Cause & Result Conjunctions

The cause chain

Every event has a reason and a result. The cause chain connects them: because opens the reason, so delivers the result, therefore announces it in formal clothes.

🧩

Because + clause — the reason

why it happened

She stayed home because she was sick

🔗

So — the result

what happened next

She was sick, so she stayed home

🎩

Therefore — the formal result

a new sentence, a formal suit

She was sick. Therefore, she stayed home.

📦

Due to / because of + noun

the reason as a noun

She stayed home due to her illness

⚠️ Reason → because (clause) or due to (noun). Result → so (informal) or therefore (formal).

02

The Formula

The chain: reason → connector → result

The reason and the result are the same chain in different orders: because leads with the reason, so leads with the result, therefore starts fresh.

⚙️نفس البنية في الأشكال الثلاثة
Because — reason first
Becauseshe was sick,she stayed home

Because she was sick,she stayed home

Because — result first
She stayed homebecauseshe was sick

She stayed homebecause she was sick

So — result
She was sick,soshe stayed home

She was sick,soshe stayed home

Due to + noun
The gamewas cancelleddue tothe storm

The game was cancelleddue to the storm

03

Common Mistakes

Four chain slips

The chain breaks when two connectors carry one link, when because of tries to hold a clause, or when so that sneaks into a plain result.

Because she was sick, so she stayed home.

Because she was sick, she stayed home.

💡 Because already connects — no so needed.

She stayed home because of she was sick.

She stayed home because she was sick.

💡 because + clause, because of + noun.

She was sick so that she stayed home.

She was sick, so she stayed home.

💡 so that is for purpose — a plain result takes so.

Due to it rained, the game was cancelled.

Due to the rain, the game was cancelled.

💡 due to + noun, never a clause.

04

Quick Quiz

Test what you just learned

Three minutes, five questions — check what stuck. No essay questions, we promise.

سؤال 1 / 50 / 5

He passed ___ he studied hard.

💡 معلومات إضافية2 أقسام
05

Reason or Result?

The chain, decided in two questions

Two questions sort the whole chain: what you give first, and whether a clause or a noun follows.

Do you give the reason or the result?
Reason — because / due tobecause she was sick / due to her illness
Result — so / thereforeso she stayed home / Therefore, she stayed home
After the reason, a clause or a noun?
Clause — becausebecause she was sick
Noun — due to / because ofdue to the storm
06

The Cause Chain Set

Match the link with its job

Five links in the chain, five jobs. The chain holds when each link sits in its place.

because
reason + clausebecause she was sick
because of
reason + nounbecause of the storm
due to
reason + noun (formal)due to the fog
so
result (informal)sick, so she stayed
therefore
result (formal)Therefore, she was late

⚠️ Because and so are the everyday chain; therefore and due to are the formal suits.

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