Look at you answer to 4a then work with a friends a. does holly know the boys number? b. no she doesn't. if she knew his number, she'd a. has she got his address? b. no she hasn't. if she a. has the boy got holly's b. no, if a. does the boy go to holly' b. no

If she knew his number, she'd call him
has she got his address?
no she hasn't. if she had it, she would go to him
has the boy holly's number?
no, he hasn't. if he had, he would call her
does the boy go to holly's house?
no, he doesn't. if he had holly's address, he would go.