main reason why

USAGE SUMMARY

The phrase "main reason why" is correct and usable in written English.
You can use it to introduce an explanation for something. For example, "The main reason why I was late for work this morning was because there was an accident on the freeway."

✓ Grammatically correct

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

This is the main reason why alignment programs may fail to produce biologically reasonable output alignments.

Algorithms for Molecular Biology

"That's the main reason why they're here".

The New York Times

It is the main reason why calculus is so effective.

Harvard University

"That was the main reason why there was doubt.

The New York Times

"They're the main reason why we won today".

The New York Times - Sports

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

The New York Times - Sports

"It's the main reason why I am here".

The New Yorker

Most probably this is the main reason why historical Ottoman buildings were resistant against serious earthquakes.

Construction and Building Materials

This is the main reason why post-discharge nitriding works at high temperature.

Surface and Coatings Technology

This explais the main reason why the inertinite has a better adsorption.

Procedia Earth and Planetary Science

Being cool is the main reason why kids form bands, in the same way as it's the main reason why they start smoking and mumble.

The Guardian - Music

Expert writing Tips

Best practice

When using "main reason why", avoid redundancy by not repeating the word "reason" unnecessarily in the explanation that follows.

Common error

Avoid redundant phrasing such as "The main reason why is because...", as "because" already implies a reason. Instead, use "The main reason why..." followed directly by the explanation.

Linguistic Context

The phrase "main reason why" functions as a causal connector, introducing the primary explanation or cause for a particular situation or event. Ludwig examples show its consistent use in linking a problem or observation to its fundamental cause.

Expression frequency: Very common

Frequent in

Science

44%

News & Media

35%

Academia

20%

Less common in

Formal & Business

1%

Encyclopedias

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, "main reason why" is a grammatically correct and very common phrase used to introduce the primary cause or explanation for a situation. Ludwig AI confirms its validity. It's suitable for various contexts, including science, news, and academia, though predominantly found in scientific literature. While it's a useful phrase, avoid redundancy by not following it with "because". Alternatives like "primary cause for" or "chief reason for" can offer variety. Remember, the goal is to clearly and concisely convey the most important reason.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

primary cause for

This alternative focuses on the causal relationship, emphasizing the primary instigator of an event.

chief reason for

This option emphasizes the ranking of importance, suggesting the reason is the most significant.

principal motive behind

This variation highlights the underlying motivation driving an action or decision.

foremost rationale for

This alternative lends a more formal tone and emphasizes the justification behind something.

biggest factor in

This phrase emphasizes the magnitude of influence a certain element has.

key determinant of

This alternative stresses the decisive influence on the final outcome.

central explanation for

This option focuses on providing a clear and primary explanation for a phenomenon.

core driver of

This alternative highlights the foundational element propelling a process or outcome.

underlying basis for

This option suggests a fundamental reason that supports or justifies something.

real reason for

This phrase highlights the genuine or actual justification for something, often implying a contrast to perceived or stated reasons.

FAQs

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

Use "main reason why" to introduce the most important explanation or cause for something. For example, "The "main reason why" the project failed was poor planning."

What are some alternatives to "main reason why"?

You can use alternatives such as "primary cause for", "chief reason for", or "principal motive behind" depending on the context and the nuance you want to convey. See more alternatives "here".

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

While commonly used, "The main reason why is because..." is considered redundant. It's better to say "The "main reason why"..." followed directly by the explanation, omitting "because".

What's the difference between "main reason why" and "one reason why"?

"Main reason why" indicates the most significant or primary cause, while "one reason why" suggests that there are multiple contributing factors, with the stated reason being just one of them.