Linking language · Cause and effect

Cause and effect connectors in English

These connectors tell the reader that what comes next is the consequence of what came before. Use cause and effect when the second sentence would not be true without the first. This is the connector family that carries an argument forward: it is how a reason becomes a conclusion.

6 connectorseach with where it goes and how it is punctuated

2 worked examplesthe relationship, explained

2 common mistakeswith the repair

4 exercisesrelationship first, then the word

Start here · the long version

What cause and effect connectors really claim

Cause connectors state which of two things produced the other, and they carry a claim about direction that the sentence commits you to.

Direction is the claim, and it is checkable

Every connector in this family points an arrow. “Therefore” puts the cause first and the effect second; “because” does the opposite. Choosing the wrong one does not produce awkward English — it produces a fluent sentence that argues the reverse of what you meant, which is the most expensive kind of error because nothing in the writing looks wrong.

The second trap is claiming a cause you only have a correlation for. “Screen time causes poor sleep” and “screen time is associated with poor sleep” are different claims, and only the second one survives contact with someone who knows the research. In Task 2 you have no sources, so the safer verb is nearly always the honest one — and reaching for the causal claim to sound decisive is how a paragraph acquires a weakness a reader can see and you cannot.

Then there is the grammar, which is unusually unforgiving here. “Because” takes a clause and “because of” takes a noun; “due to” follows a noun and a form of “be”. These are three different structures for one idea, and each one produces a fragment if you pick the wrong shape for what follows it.

Which way the arrow points

“Therefore” = cause first. “Because” = effect first. Swapping them reverses the argument fluently.

Cause or correlation

“Causes” claims a mechanism. “Is associated with” claims they move together. You usually only have the second.

Clause or noun

“Because it rained” takes a clause; “because of the rain” takes a noun. “Because of it rained” is neither.

“Due to” is fussier

In careful writing it follows a noun and “be”: “the delay was due to funding”. Opening a sentence with it is still marked.

What it costs you to skip this

A reversed causal connector is invisible to the writer and obvious to the reader: the paragraph now argues the opposite of the position stated in the introduction, and the response contradicts itself without anybody noticing at the point where it happened. An overclaimed cause is cheaper but constant — it hands a reader a counter-example to think of while they are still reading your evidence.

Where it stops applying

Two things happening in sequence are not necessarily cause and effect, and a connector cannot make them so: the logic has to be in the ideas before the word goes in. Nor does this family stack — three causal links in one sentence produces a chain nobody can follow, and the third link is usually the one you cannot defend anyway.

Examples · what these words actually do

A connector joins two sentences and names the relationship between them

That is the whole job. The words are not decoration and they are not interchangeable: each one makes a claim about how the second sentence relates to the first, and the reader will read it that way whether you meant it or not. Here is what this family claims.

First sentence

Online platforms carry no rent on a high street, so they can undercut physical shops.

As a result

Second sentence

Many high-street retailers have closed permanently.

The second sentence would not be true without the first. It is not another fact standing beside it — it is what the first one produced. A cause-and-effect connector tells the reader to read it that way.

When you need it
Use cause and effect when the second sentence would not be true without the first. This is the connector family that carries an argument forward: it is how a reason becomes a conclusion.

The connectors

Where each one goes, and how it is punctuated

They do not all behave the same way. Two connectors can mean the same thing and still be written differently — that is where most linking errors come from.

As a result

Neutral

Opens the sentence with a comma. The effect follows; the cause is what you just wrote.

Therefore

Formal

Opens the sentence, or sits after the subject: “The council therefore reduced the budget.”

Consequently

Formal

Opens the sentence. Interchangeable with “as a result” in almost every context.

Hence

Formal

Opens a clause and is often followed by a noun phrase rather than a full clause: “hence the delay”.

Due to / Owing to

Formal

Followed by a noun, never a clause: “due to the delay”, not “due to it was delayed”.

This means that

Neutral

Opens the sentence. Useful when the effect needs spelling out rather than naming.

Watch one · then do three

See the relationship before you choose the word

The connector is not a decoration. It is a claim about how the two halves relate, and the reader will hold you to it.

Worked example · As a result

E-commerce platforms can undercut physical shops because they carry no rent on a high street.

As a result, many traditional high-street retailers have been forced to close permanently.

Why this one: The closures are the consequence of the price gap. “In addition” would list them as a separate fact and lose the causal link that the argument depends on.

Worked example · Due to

Noun, not clause.

Due to the shortage of qualified staff, waiting times doubled.

Why this one: “Due to” attaches to a noun phrase. If you want a clause, use “because”: “Because staff were in short supply, waiting times doubled.”

What goes wrong

The two mistakes this family produces

Due to the city invested in cycle lanes, journeys became safer.

“Due to” cannot take a clause. The word that can is “because”.

Repaired: Because the city invested in cycle lanes, journeys became safer.

The population is ageing. Therefore, some people think pensions should change.

“Therefore” claims a consequence, but what follows is an opinion someone holds, not a result of ageing. The logic does not survive the connector.

Repaired: The population is ageing. As a result, pension systems face a funding gap that did not exist a generation ago.

Now you try · with the scaffolding on

Build it one step at a time

State the causal relationship — in the right direction, and at a strength you can defend.

The material

Two facts: (a) the city widened its main roads; (b) traffic volumes rose within three years.

Step 1Decide which way the arrow points, in plain English

Which one produced the other? Write it out before choosing any connector.

Your version0 words · minimum 8

8 more words before you can compare. Writing it yourself first is the whole exercise.

Step 2Choose the connector that puts the cause first

Step 3Write it, at a strength the evidence supports

Exercises · step 1, the relationship

Before the word, the direction

Choosing the connector is the second decision. The first one is noticing where the next sentence is going.

Step 1 · the relationship

Which sentence comes next — and why that one?

The sentence you have: The city removed general traffic from three central streets.

Three sentences could follow. Only one of them what comes next is the consequence of what came before. Choose it before you think about any connector.

Exercises · step 2, the word

Choose the connector the sentence actually needs

Now that you can see the direction, pick the word that announces it. The first wrong answer gives you a hint and a second attempt, and every wrong option explains what it would have signalled instead. Nothing here is scored.

Online retail platforms consistently undercut physical stores on price and convenience. _______, many traditional high-street retailers have been forced to permanently close their stores.

The city removed general traffic from three central streets. _______, pedestrian numbers rose and collisions at those junctions fell by half.

Waiting times doubled in the region’s hospitals last winter, _______ a shortage of qualified nursing staff rather than a rise in admissions.

The other families