应该是hold on it还是hold on to it?

应该是hold on it还是hold on to it? 请问坚持……是hold on it还是hold it on? I will hold on it . hold on to your umbrella so that it doesn't Blow away. hold为 i will hold on it this time hold on ,hold up,hold to,hold out分别 Hold on to your hold on to a hold on to forever hold on to the hold on to sth hold up to hold on,hold onto,hold to有什么区别呢?