Do you know the boy lying under the big tree?为什么是定语?

Do you know the boy lying under the big tree?为什么是定语? DO YOU KNOW THE BOY-----UNDER THE BIG TREE? Do you know the boy __ under the big tree? 1 Do you know the boy _____ under the big tree? )Do you know the person who is under the big tree.Do you kno ( )Do you know the boy under the tree?_____ one?A.Who B.Whos 什么 do you call the boy under the tree? Do you know the boy____(戴)glasses under the tree. Do you know the woman standing under the tree?为什么用standing? Do you know the boy___under the big tree? There is a boy under the big tree do you know the man under the tree?sorry,l don't know() a.ho