My goal is to be rich中为什么用to be而不是being?

My goal is to be rich中为什么用to be而不是being? My goal in life is to be rich. 为什么说my dream is to be a worker 而不是my dream is being a worker they have fun (being) with their family 括号中为什么填being而不是to be I think being a teacher is very interesting中 为什么不用to be 而用be it isn't easy being the new kids at school.为什么用being而不是to be "I want to be an actor"中为什么要用be而不是is? 为什么it is not easy being a teenager,用being 而不用to be a teenage being cool is popular 为什么不是to be Strive for my goal, I need to be with you wish用法My wish is to be a doctor.为什么不能说my wish is（that)being I prefer ( ) outside on sundays .为什么是 being 而不是to be?prefer