Expressing Cause and Effect in English: A Clear B2–C1 Guide

Expressing cause and effect in English is essential if you want to write clearly, speak logically and connect your ideas naturally. Whether you are preparing for B2 First, C1 Advanced or simply improving your everyday English, cause-and-effect language will help you explain reasons, results and consequences with confidence.

When we explain ideas in English, we often need to show why something happened and what happened as a result. This is called expressing cause and effect.

Cause explains the reason.

Effect explains the result.

Look at this simple example:

• Brian ate too much, so he felt sick.

In this sentence:

Cause: Brian ate too much.

Effect: He felt sick.

We can also reverse the order:

• Brian felt sick because he had eaten too much.

The meaning is the same, but the emphasis changes. In the first sentence, we begin with the cause. In the second, we begin with the effect.

Learning how to express cause and effect in English will help you write more clearly, especially in essays, reports, articles and Cambridge exam tasks. It will also make your speaking sound more organised and precise.

What Is Cause and Effect?

Once you understand the basic relationship between a reason and a result, expressing cause and effect in English becomes much easier.

A cause is the reason why something happens.

An effect is the result or consequence of that action, situation or event.

Compare these examples:

Cause: It rained heavily.

Effect: The match was cancelled.

We can express this in different ways:

• The match was cancelled because it rained heavily.
• It rained heavily, so the match was cancelled.
• The match was cancelled due to heavy rain.
• It rained heavily. As a result, the match was cancelled.

All these sentences express the same basic idea, but they use different grammar patterns and levels of formality.

Expressing Cause in English

The first step in expressing cause and effect in English is learning how to introduce causes, reasons and explanations.

When we express cause, we explain the reason for something. These words and phrases answer the question Why?

Because

Because is one of the most common ways to give a reason. It is followed by a clause.

Structure:

because + subject + verb

• Sara couldn’t close her suitcase because it was too full.
• Many people move to big cities because they are looking for better job opportunities.

Because is neutral and can be used in both spoken and written English.

Because of

Because of is followed by a noun, noun phrase or gerund, not a full clause.

Structure:

because of + noun / noun phrase / -ing form

• Two children were absent from school because of illness.
• She lost her confidence because of being criticised so often.

Compare:

• The match was cancelled because it rained heavily.
• The match was cancelled because of heavy rain.

Both sentences are correct, but the grammar after the linking phrase is different.

Due to

Due to means because of. It is often used in formal or semi-formal English.

Structure:

due to + noun / noun phrase

• The flight was delayed due to technical problems.
• The road was closed due to severe flooding.

In formal writing, due to is especially common after the verb be:

• The delay was due to bad weather.
• The mistake was due to poor communication.

In everyday English, many people also use it at the beginning of a sentence:

• Due to bad weather, the match was cancelled.

This is now very common, although in very formal writing, because of or owing to may sound smoother.

Owing to

Owing to is a formal phrase meaning because of.

Structure:

owing to + noun / noun phrase

• The football match was cancelled owing to heavy rain.
• The shop closed early owing to staff shortages.

This phrase is more common in written English, official notices and formal reports.

On account of

On account of also means because of. It is fairly formal and is followed by a noun phrase.

Examples:

• The meeting was postponed on account of the CEO’s health problems.
• The road was closed on account of the accident.

This expression is useful, but learners should not overuse it in everyday conversation because it can sound a little formal.

As and Since

As and since can also be used to give reasons. They are often used when the reason is already known or not the most important part of the sentence.

Structure:

as / since + subject + verb

• As it was getting late, we decided to go home.
• Since we had very little money, we stayed in a cheap hotel.

Because usually gives a more direct reason.

As and since often sound softer or more explanatory.

Compare:

• I left because I was tired.

This directly answers the question: Why did you leave?

• As I was tired, I decided to leave.

This gives background information before the main idea.

Given that

Given that means considering that. It introduces a reason or fact that helps explain a decision, opinion or situation.

• Given that pollution is highest in urban areas, cars and taxis are often seen as major contributors.
• Given that she had no previous experience, she did remarkably well.

This phrase is useful in essays because it helps you sound analytical and thoughtful.

In view of / In light of

In view of and in light of mean after considering certain facts. They are formal and often used in reports, announcements, essays and official decisions.

Structure:

in view of / in light of + noun phrase

• In view of his poor behaviour, the school decided to suspend him.
• In light of the experts’ findings, the government evacuated residents from the area.

There is a slight difference:

In view of often suggests that a decision is based on a situation.

In light of often suggests that new information has changed the way people understand something.

Thanks to

Thanks to usually introduces a positive cause, although it can sometimes be used sarcastically.

• Thanks to the lifeguard, the boy was rescued in time.
• The fire was spotted early thanks to an alert neighbour.

Be careful: thanks to usually suggests that the result is good.

Natural:

• Thanks to your help, I passed the exam.

Less natural:

• Thanks to the accident, we were late.

However, sarcastic use is possible:

• Thanks to your brilliant idea, we missed the last train.

Here, the speaker is clearly annoyed.

By reason of

By reason of is a very formal phrase meaning because of. It is mostly used in legal, official or very formal writing.

• The aircraft made an emergency landing by reason of severe weather conditions.
• The application was rejected by reason of incomplete documentation.

This phrase is useful to recognise, but learners should use it carefully. In normal writing, because of, due to or owing to will usually sound more natural.

Expressing Effect in English

The second part of expressing cause and effect in English is showing what happens as a result.

When we express effect, we show the result or consequence of something. These words and phrases answer the question:

What happened as a result?

So

So is the most common way to express result in everyday English.

• Brian ate too much, so he felt sick.
• The instructions were unclear, so many students made mistakes.

So is simple, natural and very common in speaking and informal writing.

As a result

As a result is used to show that one thing happened because of another. It is common in formal and semi-formal writing.

• Many homes were destroyed in the earthquake. As a result, thousands of people had to leave the area.
• Richard was injured as a result of a car accident.

Notice the two common patterns:

As a result, + clause

• The roads were icy. As a result, several accidents occurred.

As a result of + noun phrase

• Several accidents occurred as a result of the icy roads.

Therefore

Therefore means for that reason. It is common in formal writing, essays, reports and logical arguments.

• The evidence is weak; therefore, we cannot reach a firm conclusion.
• Your argument is based on personal opinion and is therefore not entirely reliable.

Therefore is useful in academic and exam writing, but it can sound a little too formal in casual conversation.

Everyday:

• I was tired, so I went home.

Formal:

• I was tired; therefore, I decided to go home.

Consequently

Consequently is a formal way of saying as a result.

• Ryan spent most of his money immediately and consequently had to borrow money for food.
• The operation was complicated and consequently took longer than expected.

This word is especially useful in essays and reports.

Accordingly

Accordingly means in a way that is appropriate as a result of what has happened. It is quite formal.

• Material prices rose rapidly and, accordingly, the company increased its product prices.
• Gary complained of severe hip pain and was accordingly admitted to hospital.

Accordingly often suggests that someone changes their behaviour or decision to match a new situation.

For this reason / For that reason

These phrases refer back to a reason already mentioned.

• Chris didn’t do his homework. For this reason, the teacher kept him after class.
• John rarely attended staff meetings, and for that reason, he was eventually dismissed.

For this reason usually refers to something just mentioned.

For that reason can sound slightly more distant or reflective.

Hence

Hence means for this reason or as a result. It is formal and sometimes sounds old-fashioned or academic.

• David fell off his bike, hence the bruises.
• His mother is French, hence his name, René.

This word can be useful, but it should be used sparingly. Too much hence and your essay may start wearing a top hat.

Thus

Thus means therefore or as a result. It is common in formal and academic writing.

• Alan sold his car and thus had enough money to travel to Brazil.
• The witness died, thus making it impossible to prove the case.

A common pattern is:

thus + -ing form

• The factory closed, thus leaving hundreds of people unemployed.
• The new system reduced paperwork, thus improving efficiency.

Bring about

Bring about is a phrasal verb meaning to cause something to happen.

• The drop in interest rates brought about job growth.
• The new education law is expected to bring about improvements in academic performance.

This phrase is especially useful when talking about social, economic or political changes.

Lead to

Lead to means to cause something to happen or develop.

• Poor communication can lead to serious misunderstandings.
• A lack of sleep often leads to poor concentration.

This is one of the most useful cause-and-effect expressions in English.

Result in

Result in means to cause a particular outcome. It is common in formal English.

• The heavy rain resulted in widespread flooding.
• The company’s poor decisions resulted in financial losses.

Compare:

• The fire resulted from faulty wiring.

This means faulty wiring caused the fire.

• The fire resulted in serious damage.

This means serious damage was the effect of the fire.

This difference is important.

Cause and Effect: Useful Comparison Table

The table below summarises the most useful structures for expressing cause and effect in English.

because	gives a reason	because + clause	neutral
because of	gives a reason	because of + noun phrase	neutral
due to	because of	due to + noun phrase	semi-formal/formal
owing to	because of	owing to + noun phrase	formal
on account of	because of	on account of + noun phrase	formal
as / since	gives a known reason	as/since + clause	neutral/formal
given that	considering that	given that + clause	formal
in view of	considering	in view of + noun phrase	formal
thanks to	because of something positive	thanks to + noun phrase	neutral
so	shows result	clause + so + clause	informal/neutral
as a result	shows result	as a result + clause	neutral/formal
therefore	shows logical result	therefore + clause	formal
consequently	shows result	consequently + clause	formal
thus	shows result/conclusion	thus + clause / thus + -ing	formal
hence	for this reason	hence + noun/clause	formal
lead to	cause	lead to + noun/-ing	neutral/formal
result in	cause a result	result in + noun/-ing	formal
bring about	cause to happen	bring about + noun phrase	neutral/formal

Common Mistakes with Cause and Effect

1. Using because of before a full clause

Incorrect:

• She was late because of the bus broke down.

Correct:

• She was late because the bus broke down.
• She was late because of the broken-down bus.

Use because before a clause.

Use because of before a noun phrase.

2. Using due to incorrectly with a clause

Incorrect:

• The match was cancelled due to it rained.

Correct:

• The match was cancelled because it rained.
• The match was cancelled due to the rain.

After due to, use a noun or noun phrase.

3. Confusing result in and result from

Incorrect:

• The accident resulted from several injuries.

Correct:

• The accident resulted in several injuries.

Use result in for the effect.

Cause → result in → effect

• The storm resulted in serious damage.

Use result from for the cause.

Effect → result from → cause

• The damage resulted from the storm.

4. Overusing very formal linkers

Learners sometimes use too many formal linking words in simple sentences.

Unnatural:

• I was hungry; therefore, I ate a sandwich.

Better:

• I was hungry, so I ate a sandwich.

Formal linkers are useful, but they should match the context. In everyday English, simple words often sound best.

5. Forgetting punctuation with formal linkers

Formal result linkers such as therefore, consequently and as a result are often separated with commas.

• The evidence was unreliable. Therefore, the case was dismissed.
• The weather was extremely poor. Consequently, the match was postponed.
• The company reduced its prices. As a result, sales increased.

You can also use a semicolon in more formal writing:

• The evidence was unreliable; therefore, the case was dismissed.

Cause and Effect in Cambridge English Writing

Cause-and-effect language is especially useful in B2 First and C1 Advanced writing.

You can use it in essays, reports, proposals, articles, reviews, and formal emails

For example, in an essay:

• Many young people spend too much time online. As a result, they may find it harder to concentrate on longer reading tasks.

In a report:

• Several students complained about the lack of quiet study areas. For this reason, the library should consider creating a silent reading room.

In a proposal:

• The current booking system is confusing and often leads to mistakes. Therefore, a simpler online system would be beneficial.

In an article:

• More people are choosing to work from home, partly because modern technology makes remote communication easier.

These expressions help your writing sound more organised and logical.

Do the quiz to perfect your knowledge:

Final Thoughts

Expressing cause and effect in English is essential if you want to connect your ideas clearly. Simple words such as because and so are perfect for everyday English, while more formal expressions such as therefore, consequently, owing to and in light of can make your writing more precise and sophisticated.

The key is not to use the most complicated phrase every time. Good English is not a parade of fancy linkers. It is about choosing the right expression for the right situation.

Master these cause-and-effect structures, and your essays, reports and conversations will become clearer, stronger and much more natural.

Related posts:

Linking Words and Phrases 

Expressing Opinions and Arguments in English 

How to Write an Essay for B2 First (FCE) 

How to Write a Report for B2 First 

Even If, Even Though, Even So, Even As 

Other Ways to Say “In Order to” 

Linking Words for Concession 

Grammatical Patterns after Reporting Verbs

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