Bob read is my father's friend.but all of us call him"Mr goi

Bob read is my father's friend.but all of us call him"Mr going——to——do",do you know___?because he always says he is going to do something.____ he never does it."I'm going to clean my house today"."I'm going to wash car today?"we all know he will do ____.
My father often says to us."are you going to do something"_____do it.don't____another"Mr going——to——do!"