1.139 structures used with 'any-'
Indefinite pronouns beginning with 'any-' can be used as the object or indirect object of a question or a negative clause.
They are often used as the subject of both negative and affirmative questions. Note that they are not used as the subject of a negative statement. That is, you do not say 'Anybody can't come in'.
Note that when you are making an affirmative statement, 'anyone' and 'anybody' are used to refer to people in general and not to only one person.