Englishfor English speakers
who
Pronoun
—
You use who to add a clause to explain more about the person or people you're talking about.
They are good people who are working hard.
We saw Kim, who was in his car.
We asked everybody who was there.
It was you who lost the keys, not me.
—
You use who to ask about a person or people.
Who was on the phone?
Whos your new teacher?
Who did you meet today?
He told me who was there.
I'll ask who can help us.
was
Verb
—
A form of the verb be used to talk about yourself, or another person in the past.
I was singing in the shower.
Who was that girl you were talking to?
that
Determiner
—
Used to show which thing we are talking about; used with things that are not close to the speaker.
Give me that book, not this one.
Give me that, not this.
That dog is hungry.
that
Subordinator
—
used to link a subordinate clause to a main one
You said that you liked me.
Give me the book that I dropped.