走廊里那个声音不可能是老板——他这周人都在日内瓦开会。
That couldn't have been the boss's voice in the hallway — he's at a conference in Geneva all week.
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couldn't英 /ˈkʊdnt/|美 /ˈkʊdnt/
been英 /biːn/|美 /bɪn/
解释
couldn't have been 是对过去身份或来源的否定推测，即'在当时不可能是某人发出声音'，以地理位置排除可能。
That couldn't have been the boss's voice in the hallway — he's at a conference in Geneva all week.
couldn't have been 是对过去身份或来源的否定推测，即'在当时不可能是某人发出声音'，以地理位置排除可能。