1. don't bet on...,I wouldn't bet on...
不可能，不相信
如：Just don't bet on Old Jim gaining a lot of ground.
可别相信老吉姆，他不会有多大进展的。
2. I('ll) bet
表示对某事非常肯定，有时带有挑衅的意味
如：I bet it'll rain tomorrow.
我敢打赌，明天会下雨的。
3. (I) bet you anything
可用what you like代替anything，意思是“赌什么都可以，你敢不敢赌”
如：Bet you what you like she will get drunk.
她会喝醉的，赌什么都可以。
4. What's the betting...?
信不信...肯定会(不会)...?
如：What's the betting they'll be asleep when we get back?
信不信，我们回来的时候他们肯定睡觉了?
5. You bet!
当然，一定啦，肯定会的
如：-Are you coming?
-You bet.
-你来吗？
-当然啦
6.make / have a bet on
打赌
如：Let's make a bet on the next election.
我们就下次的选举打个赌吧。
