i bought two expensive dictionaries here half an hour ago
but i forgot to take them with me
who served you,sir
the lady who is standing behind the counter
which books did you buy
the books which are on the counter
did you serve this gentleman half an hour ago,caroline
he says he's the man who bought these books
i can't remember
the man who i served was wearing'a hat
have you got a hat ,sir
yes,i have
would you put it on,please
all right
is this the man that you served,caroline
yes,i recognize him now