作业帮he must have read this book yesterday用完成?he must read this book yesterday?才对吧
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he must have read this book yesterday用完成?he must read this book yesterday?才对吧
he must have read this book yesterday用完成?
he must read this book yesterday?才对吧
he must have read this book yesterday用完成?he must read this book yesterday?才对吧
he must have read this book yesterday
must have done
这是用来推测的．
两句的意思是有差别的
第一句是must对过去的肯定推测 翻译为：他昨天一定读了这本书
第二句是must的常见用法 本身有“必须 一定”的意思 ，含有责任 义务
。只能和现在时连用