When you are talking about possible situations, you can express how likely you think they are. 表达可能性有多大可用以下方式：

• ◆ It's pretty much inevitable that prices will go up this year. 今年价格上涨几乎是不可避免的了。
• ◆ I think it's likely to rain this afternoon. 我觉得今天下午有可能下雨。
• ◆I'm probably going to be away then. 到那时候我可能就要离开了。
• ◆ I guess there's a fifty per cent chance that they'll say no. 我估计他们不同意的几率有百分之五十。
• ◆ It's unlikely, but not totally impossible, I suppose. 我想这不大可能，但并非完全没有可能。
• ◆ They can't possibly/really be serious about buying a boat! 他们不可能真要买一条船吧！
• ◆Let's start without them. They're bound to be late. 咱们不等他们了，先开始吧。他们肯定会迟到。