1．You must/may(might)be hungry now， ？→I am sure/guess that you are hungry now，aren't you？→You must/may (might)be hungry now，aren't you?
你现在一定/可能饿了，是吗？
2．You must have heard about it， ？→I am sure that you have heard about it，haven't you？→You must have heard about it，haven't you?
你一定听说过这事了，是吗？
3．You must have watched that football match last night， ？→I am sure that you watched that football match last night，didn't you→You must have watched that football match last night，didn't you?
你昨晚一定看那场足球赛了，是吗？(陈述部分有表示过去的时间状语last night)
