hold on to.这里的to 是什么词性?

hold on to.这里的to 是什么词性? hold on to 的意思 hold on to do sth hold on to doing sth ,哪个对look forward to doing 这里又怎么搞的 Hold on to your hold on to forever hold on to a hold on to the hold on to the hold on to the hold on to sth hold up to hold on 和 hold on to 用法的区别在哪里?hold on to 这个“to”指什么? hold on to的英文意思 hold on ,hold up,hold to,hold out分别 I'll hold on to hold on to your love hold on to your love hold on to the balloon hold on to my dream