which was why

USAGE SUMMARY

"which was why" is a perfectly correct and usable phrase in written English.
You can use it when you are referring to a prior comment or thought, in order to explain or rationalize why something happened. For example, "I knew I had to take the job, which was why I accepted the offer."

✓ Grammatically correct

News & Media

Science

Academia

Human-verified examples from authoritative sources

Exact Expressions

53 human-written examples

Which was why she always wore kneesocks.

The New Yorker

Which was why, now, no seats.

The New Yorker

Which was why he was glad he did it.

The New York Times - Books

Which was why he was on Santana's screen.

The New York Times - Magazine

Which was why the locals found the first half inexplicable.

The Guardian - Sport

Mobutu had done the same, which was why the Rwandan army helped Kabila topple him.

The Economist

Human-verified similar examples from authoritative sources

Similar Expressions

7 human-written examples

Which is why they're cool".

Independent

Which is why Obamacare is profoundly unamerican.

The Economist

Which is why investors are so nervous.

The Economist

Which is why we bother watching.

The New York Times - Sports

Which is why I started meditating.

The New York Times

Expert writing Tips

Best practice

Use "which was why" to clearly establish a cause-and-effect relationship between two clauses. Ensure the sentence flows logically, with the 'which' referring back to a specific event or situation mentioned earlier.

Common error

Avoid using "which was why" when 'that' would be more appropriate. 'Which' introduces non-essential, additional information, while 'that' introduces essential information. If removing the clause changes the sentence's core meaning, 'that' is preferable. If it can be removed, use 'which'.

Linguistic Context

The phrase "which was why" serves as a causal connector, linking two clauses to show a cause-and-effect relationship. It introduces a clause that explains the reason for something mentioned in the preceding clause. As Ludwig AI indicates, it is grammatically correct and usable in written English.

Expression frequency: Very common

Frequent in

News & Media

75%

Science

15%

Academia

10%

Less common in

Encyclopedias

0%

Formal & Business

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, "which was why" functions as a versatile causal connector used to establish a clear cause-and-effect relationship between clauses. Ludwig AI confirms its grammatical correctness and widespread usability. It is commonly found in News & Media, scientific, and academic contexts, making it appropriate for neutral and formal communication. To enhance clarity and avoid common errors, remember to use a comma before "which was why" and ensure it correctly introduces non-essential information. By understanding its function and appropriate usage, writers can effectively convey logical connections and explanations in their writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

that's the reason why

Replaces "which was" with "that's the reason", slightly more informal.

that explains why

Focuses on providing an explanation for a given situation.

that is why

More formal and direct replacement of "which was why".

as a result

Indicates that something happens due to a preceding action or event.

therefore

A single-word formal substitute indicating consequence.

for this reason

Highlights the specific reason behind a particular situation.

consequently

Similar to "therefore" but emphasizes the result or outcome.

this is the explanation

Directly states that what follows is the explanation for something.

thus

A concise and somewhat formal way to indicate consequence or result.

it follows that

A more formal way to express a logical consequence.

FAQs

How do I use "which was why" in a sentence?

"Which was why" is used to introduce a clause that explains the reason for something previously mentioned. For example, "The co-pilot had overslept, "which was why" we were delayed".

What can I say instead of "which was why"?

You can use alternatives like "that is why", "therefore", or "consequently" depending on the context.

Is it always necessary to use a comma before "which was why"?

Yes, a comma is generally required before "which was why" because it introduces a nonrestrictive (nonessential) clause that provides additional information.

What's the difference between "which was why" and "because"?

"Which was why" connects two clauses, with "which" referring back to the previous clause. "Because" introduces a clause that directly states the reason. "He was late, "which was why" he missed the meeting" versus "He missed the meeting because he was late."