a main reason why

USAGE SUMMARY

The phrase "a main reason why" is correct and usable in written English.
It can be used to introduce an explanation or justification for a particular situation or decision. Example: "A main reason why we decided to implement the new policy is to improve efficiency in our operations."

✓ Grammatically correct

News & Media

Science

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

39 human-written examples

He's obviously a main reason why we're here".

The New York Times - Sports

"This is a main reason why spammers are not arrested," he said.

The New York Times

Skopje's airport was renamed Alexander the Great, a main reason why the angry Greeks blocked Macedonia's NATO bid.

The Economist

China is Australia's biggest market, and, through its inexhaustible appetite for Australian minerals, a main reason why Australia is enjoying its 22nd consecutive year of economic growth.

The Economist

Georgia's location in the unstable Caucasus area, a corridor between Russia and the Middle East, is a main reason why the United States wants close relations.

The New York Times

But the industry has consistently opposed a pricing clause, and its protests were a main reason why the National Institutes of Health abandoned such a provision in 1995.

The New York Times

Human-verified similar examples from authoritative sources

Similar Expressions

21 human-written examples

In one finger of Lake Mead buildings that were abandoned in the 1930s, as the water of the newly dammed river rose and submerged them, have eerily begun reappearing, like a ghost town.The main reason why Lake Mead, currently only 40% full, has been getting emptier is a decade-long drought.

The Economist

Compared with 2006, the Tory showing is less impressive: their share of the English vote rose by only 0.4 of a percentage point.The main reason why the Tories' lead may be precarious, though, is that voters tend to be keener on Labour in general elections than in local ones.

The Economist

Analysts say that seems odd in a country that has been crazy about caffeinated beverages since the 17th century and now spends £1.45 billion in coffee shops each year, according to Mintel, a market-research firm.The main reason why Starbucks has run persistent losses is not due to a lack of interest in its coffee, but to minimise its tax bill.

The Economist

The supply of pods (a novel resource) from mesquite was the main reason why a small percentage of respondents preferred mesquite over native trees.

Forest Ecosystems

It is said to be the largest survey of homeless people of its kind.The breakdown of a relationship is the main reason why over two-fifths of men hit the street, support workers say: James, for example, ended up sleeping in a dried-up pond after he lost his wife and his job.

The Economist

Expert writing Tips

Best practice

When using "a main reason why", ensure that the sentence clearly connects the reason to the outcome or situation being explained. Use precise language to avoid ambiguity.

Common error

Avoid using phrases like "the main reason is because". The word "reason" already implies causality, making "because" redundant. Instead, use "the main reason is" or "a main reason why" followed by the explanation.

Linguistic Context

The phrase "a main reason why" functions as a causal connector, introducing an explanation or justification for a particular event, decision, or situation. It highlights a significant cause among potentially multiple reasons. Ludwig AI confirms its correctness.

Expression frequency: Common

Frequent in

News & Media

44%

Science

34%

Wiki

8%

Less common in

Formal & Business

8%

Reference

0%

Social Media

0%

Ludwig's WRAP-UP

In summary, "a main reason why" is a grammatically sound and commonly used phrase that serves as a causal connector. It's employed to introduce a significant explanation or justification for an event or situation. As Ludwig AI confirms, it is considered correct. While versatile, writers should avoid redundant constructions like "the main reason is because". Its frequency is common across various contexts, particularly in news, science, and formal business settings.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

a primary cause for

Emphasizes the fundamental nature of the cause, stronger emphasis on causality.

a key factor in

Highlights importance as a significant element contributing to the outcome.

a central explanation for

Focuses on providing a rationale or justification, instead of the primary cause

a significant contributor to

Highlights the considerable influence of something, less about causality.

a leading rationale behind

Emphasizes the reasoning or justification behind an action or event.

a major determinant of

Focuses on influence, suggesting something decisive in defining an outcome.

an important influence on

Stresses the impact or effect something has on a particular situation.

a critical aspect of

Highlights the crucial nature of something in relation to a broader context.

a notable factor for

Emphasizes that something is worth paying attention to when considering causes.

a vital component in

Suggests that something is an essential part of a larger process or system.

FAQs

What can I say instead of "a main reason why"?

You can use alternatives like "a primary cause for", "a key factor in", or "a central explanation for" depending on the specific context.

How do I use "a main reason why" in a sentence?

Use "a main reason why" to introduce an explanation for a situation or decision. For example: "A main reason why we chose this approach is its long-term sustainability."

Is it grammatically correct to say "the main reason is because"?

While common in speech, "the main reason is because" is often considered redundant. It's more concise and grammatically preferable to say "the main reason is" or "a main reason why".

What's the difference between "a main reason why" and "a primary reason for"?

"A main reason why" introduces an explanation, while "a primary reason for" emphasizes the cause or motivation. The choice depends on whether you want to explain or justify something.