us
Us can be the object of a verb or preposition. You use us to refer to yourself and one or more other people.
Why didn't you tell us?
There wasn't room for us all.
Be careful
In standard English, don't use ‘us’ as the object of a sentence when we is the subject. Don't say, for example, ‘We bought us some drinks’. You say ‘We bought ourselves some drinks’.
In standard English, don't use ‘us’ as the object of a sentence when we is the subject. Don't say, for example, ‘We bought us some drinks’. You say ‘We bought ourselves some drinks’.
After the meeting we introduced ourselves.