Mistaken someone for someone else vs Mistaken someone as someone else

Both phrases are commonly used, but 'mistaken someone for someone else' is more widely accepted and preferred in English. 'Mistaken someone as someone else' is less common and may sound awkward to some native speakers.

Last updated: March 31, 2024

Mistaken someone for someone else

This phrase is correct and commonly used in English.

This phrase is used to indicate that someone has confused one person with another person.

Examples:

I'm sorry, I think you've mistaken me for someone else.
She mistook her neighbor for her sister.
He often mistakes his students for each other.

Alternatives:

confused someone with someone else
mixed someone up with someone else
misidentified someone as someone else
confounded someone for someone else
misunderstood someone to be someone else

Mistaken someone as someone else

This phrase is less common but still used in English.

This phrase is also used to indicate confusion between two people, but it may sound awkward to some native speakers.

Examples:

She mistakenly identified him as her brother.
He often mistakenly sees his boss as his father.
They mistook the actor as the director.

Alternatives:

confused someone with someone else
mixed someone up with someone else
misidentified someone as someone else
confounded someone for someone else
misunderstood someone to be someone else

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Mistaken someone for someone else vs Mistaken someone as someone else