keep sth to oneself 一般是表示保守秘密,比如：would keep this to yourself 你能保守这个秘密吗?keep sth for oneself表示为某人保留某样东西,如：I will keep this bag for yourself.我会为你保留这个包.
keep sth to oneself 是保守秘密,对.秘而不宣.1,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. 2,I'll tell you only if you promise to keep it to yourself．你答应保守秘密,我才告诉你. 3,I can't understand why you kept the news to yourself ...
keep to yourself 主要意思是保密.不与他人接触等Don't keep it to yourself.：别闷在心里if you promise to keep to yourself,i can tell you.如果你答应不告诉别人,我就告诉你.keep to myself 自己保留.,保守秘密.