2016-2017学年译林版必修5 Unit1 Getting along with others Language points 课件 (12)-302edu教育资源网

2. I must have sounded very proud of myself.

(1). must (when guessing, there seems to be no other possibilities)

我当时的口气听上去肯定很自得。

e.g. You must have left your wallet in the office. 你肯定是把钱包落在办公室里了。

must have done意为“一定是……”，是对过去发生的情况的肯定推测.

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