should have warned

USAGE SUMMARY

"should have warned" is a grammatically correct and usable phrase in written English.
It is used in the past perfect subjunctive when expressing a regret or a hypothetical situation that didn't happen. For example, "I should have warned Martha about the stormy weather, but I forgot."

✓ Grammatically correct

News & Media

Science

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

56 human-written examples

They barfed (sorry, I should have warned you that was coming, but you don't always get a warning with vomit) riding in the car.

HuffPost

They should have warned us".

The New York Times

"We should have warned you," Shoshana says.

The New Yorker

The look on the receptionist's face should have warned me.

The Guardian

I should have warned you about Robbie Savage.

The Guardian - Sport

Maybe John thinks I should have seen, should have warned him.

The New Yorker

You may be prone to notice your children, Renker should have warned him.

The New Yorker

Some medical researchers say federal health regulators should have warned American consumers much earlier.

The New York Times

Norbert should have warned Nachman, given him the chance to say yes or no.

The New Yorker

His glumness should have warned me that planned obsolescence has reached the level of infinite jest.

The New York Times

It could have easily fed two (as our waiter should have warned us but didn't).

The New York Times

Expert writing Tips

Best practice

Use "should have warned" to express regret or criticism about a missed opportunity to provide a warning. It emphasizes a past obligation that was not fulfilled.

Common error

Avoid using "should of warned" as it's a common misspelling. The correct form is "should have warned", using "have" as the auxiliary verb.

Linguistic Context

The phrase "should have warned" functions as a modal verb phrase expressing regret, criticism, or an unfulfilled obligation to provide a warning. It indicates that a warning was necessary or expected in the past, but was not given. Ludwig confirms its grammatical correctness.

Expression frequency: Very common

Frequent in

News & Media

60%

Science

20%

Formal & Business

10%

Less common in

Wiki

5%

Encyclopedias

3%

Reference

2%

Ludwig's WRAP-UP

In summary, "should have warned" is a grammatically sound and frequently used phrase that expresses regret or criticism over a missed opportunity to warn someone about something. According to Ludwig, it's widely accepted and appears across various reliable sources, most commonly in news and media. To avoid common errors, ensure you use "have" instead of "of". Alternatives like "ought to have cautioned" can provide similar meaning. Ludwig confirms its widespread use and correctness, underscoring its value in expressing past obligations and missed opportunities.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

ought to have cautioned

Replaces "should" with "ought to", implying a moral obligation to warn.

needed to have alerted

Emphasizes the necessity of providing a warning.

had to have forewarned

Highlights the obligation to warn in advance.

was required to advise

Indicates a formal requirement or duty to provide a warning.

should have given notice

Focuses on the act of providing notification or advance warning.

should have made aware

Emphasizes the importance of making someone conscious of a potential danger.

it was their duty to caution

Highlights a specific responsibility to provide a warning.

they were obligated to alert

Stresses a formal or legal obligation to issue a warning.

warning was imperative

Focuses on the urgency and necessity of providing a warning.

a heads-up was needed

Uses a more informal expression for providing a warning.

FAQs

How can I use "should have warned" in a sentence?

Use "should have warned" to express that someone failed to provide a necessary warning in the past. For example, "The company "should have warned" its employees about the potential risks involved."

What's a more formal alternative to "should have warned"?

A more formal alternative could be "was obligated to alert" or "was required to advise". These phrases convey a similar meaning but are suitable for professional contexts.

Is it correct to say "should of warned" instead of "should have warned"?

No, "should of warned" is grammatically incorrect. The correct phrase is ""should have warned"", where "have" is an auxiliary verb.

What's the difference between "should have warned" and "could have warned"?

"Should have warned" implies an obligation or expectation that was not met, while "could have warned" suggests the possibility of warning, without necessarily implying an obligation. The first is a missed duty, the second a missed opportunity.