keep sth from（不让他人知道）和keep sth to oneself（不让他人分享）分别怎么用?

keep sb/sth from +分词
是阻止,妨碍的意思:
1.I hope you will keep from doing anything rash.
我希望你不要做出任何鲁莽的事情来.
2.I horse around quite a lot,just to keep from getting bored.
我胡闹了一阵儿,只是为了摆脱厌烦.
3.He was argumentative,loud and just plain rude.We bit our tongues the entire weekend to keep from telling him where to go!
他好争论,大嗓门并且毫无礼貌.整个周末我们强忍住未向他下逐客令.
4.I need to find something to keep me from dozing off in the middle of class.
我必须找个东西来防止我在课堂中打瞌睡.
5.We must do something to keep the roof from falling.
我们得想个办法使房顶不致塌下来.
keep sth to oneself：
不让别人知道某事,对某事保持秘密
1.One must keep such interests to oneself.
有这类爱好不该让人知道.
2.,Don't keep the news to yourself；let's all share it．
不要只管自己知道这消息,让我们也知道吧.
3.I can't understand why you kept the news to yourself for so long．
我不明白你为什么这么长时间也不把消息告诉他人.

比如你买彩票得奖了，不想让妻子知道 就是 keep her from knowing it，把钱攥在自己手上，就是keep the money to yourself。