他不可能拿了你的书——他上周一直在国外。
He couldn't have taken your book — he was abroad last week.
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couldn't英 /ˈkʊdnt/|美 /ˈkʊdnt/
taken英 /ˈteɪkən/|美 /ˈteɪkən/
解释
couldn't 是 could not 的缩写，在此表示对过去情况的否定推测（不可能）。have taken 构成完成体，表示动作在说话前。
He couldn't have taken your book — he was abroad last week.
couldn't 是 could not 的缩写，在此表示对过去情况的否定推测（不可能）。have taken 构成完成体，表示动作在说话前。