..1) The little boy has the ability that makes people hard to say no to him. No
2) The little boy is so lovable, which makes it
hardhard for people to say no to him. You may mean this: The little boy is so lovable that it is hard for people to say "no" to him.
3) The way he asked me for the money makes it hard for me
hardto say no to him.
4) He ask me to lend him my book in a way that makes it hard for me to say no.
Student or Learner