Unexpected vs Weren't expecting that

When to use each in English, with meaning, register, and examples.

Unexpected

Top 2,000 (common)B2adjective

Weren't expecting that

InformalTop 2,000 (common)
Most formal: Unexpected
 UnexpectedWeren't expecting that
Pronunciation🇬🇧 /["/ˌʌnɪkˈspektɪd/"]/🇺🇸 /["/ˌʌnɪkˈspektɪd/"]/🇬🇧 //wɜːnt ɪkˈspɛktɪŋ ðæt//🇺🇸 //wɜrnt ɪkˈspɛktɪŋ ðæt//
MeaningSomething that happens suddenly and is not planned.A surprise or sudden change that is not anticipated.
ExampleThe unexpected turn of events left everyone in shock.When she won the lottery, we all said, 'weren't expecting that!'
RegisterNeutralInformal
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2-
Part of speechadjective
Collocationsbe, most, very, completelyreally weren't expecting that, totally weren't expecting that, kind of weren't expecting that, honestly weren't expecting that
Antonymsexpected, anticipated, predictable-
Common mistakesConfusing it with 'expected'., Using it with the wrong noun (e.g., 'an unexpected result' not 'an unexpected results')., Overusing it in a context where 'surprising' may be more appropriate.Incorrectly using in formal contexts., Using with a positive tone when context is negative., Failing to use the contraction correctly, e.g., saying 'were not expecting that'.
Usage notesUse 'unexpected' when referring to events or outcomes that surprise someone. It can be used in both casual and formal contexts, appropriate for writing and speech. Avoid using it in overly casual contexts or when discussing planned surprises.Used primarily in casual spoken English to express surprise or disbelief. It's not suitable for formal writing. Best used among friends or in informal contexts.

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Weren't expecting that

Frequently asked questions: Unexpected vs Weren't expecting that

What's the difference between Unexpected and Weren't expecting that?

Unexpected: Something that happens suddenly and is not planned. Weren't expecting that: A surprise or sudden change that is not anticipated.

Which is more formal: Unexpected and Weren't expecting that?

Unexpected is the most formal of these.

Can you show an example of each?

Unexpected: The unexpected turn of events left everyone in shock. Weren't expecting that: When she won the lottery, we all said, 'weren't expecting that!'

Can I use Unexpected and Weren't expecting that interchangeably?

Not always. Unexpected and Weren't expecting that are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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