我會向妳保證
例句：
1、And it won't happen again. i will promise you that.
我向妳保證就不會有事了。
2、I will promise you a certain number of things, and if I deliver them, then you should begin to trust me.
我會對妳們做出承諾，如果我兌現了承諾，妳們就應該開始信任我。
3、I will find someone. i promise you.
我會找到人的，我向妳保證。