pron
who
hoo
pron
1
Used to ask about the identity of a person or people.
"Who left the door open?"
"Who is coming to the party tonight?"
2
Used to introduce a clause that gives more information about a person already mentioned.
"The woman who called earlier left her number."
How to Use Who
Learner’s notesIn plain EnglishA question word or connector used to ask about, or refer back to, a specific person.
Common mistake
Use "who" for the subject of a clause ("who called?") and "whom" for the object ("to whom did you speak?") — though "who" is now standard in most everyday speech even where "whom" would be strictly correct.
Easily confused with
Word Forms
whos plural
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Fill the Gap
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_____ left the door open?
Etymology
From Old English hwā, part of the same ancient family of question-words as what, when, and where, going back to a shared Proto-Indo-European root.