求英语大手帮小弟解决下困惑in general , to和for在表达对.有什么不同比如be useful for 和b

A car is useful to me
This car is useful for me (that car is probably not, perhaps that car is useful for you)
it is useful for me to have a car
This book is useful to me, and probably useful to you as well. maybe it is useful to everyone
This book is useful for me, but not for you.
this book is useful for everyone to know the history.
怎么用要看你表达的意思,永远不要脱离你要表达的意思来记忆.
这个对你有帮助,this is useful for you这句中文如果强调的是对你而不是对其他人的时候我觉得应该用for
这个对你有帮助,this is useful to you, 强调的是这个东西‘对你来说有用处’
it is useful for me to have a car 有一辆车对我来说很方便
this book is useful for everyone to know the history.有助于我们去了解历史
it is useful to have a car 有辆车很方便,用处很多
it is useful to know the history 了解历史很有用处
还是需要多体会,多看例句,还有文中要表达的确切的意思