那场面试一定很难——她出来时脸都白了。
The interview must have been difficult because she came out looking pale.
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must英 /mʌst/|美 /mʌst/
been英 /biːn/|美 /bɪn/
解释
must have been 是对过去状态的推测，been 是 be 的过去分词，表示根据「脸色发白」推断「面试很难」
The interview must have been difficult because she came out looking pale.
must have been 是对过去状态的推测，been 是 be 的过去分词，表示根据「脸色发白」推断「面试很难」