搜狗做题网关于新概念第三册第一课的问题?
来源：学生作业帮 编辑：搜狗做题网作业帮 分类：英语作业 时间：2024/06/12 18:16:49
关于新概念第三册第一课的问题?
有一句是 As no pumas had been reported missing from any zoo in the country,this one must have been in the possession of a private collector.
对于肯定推测 have been 是死也不能改的吗? has 可否?
ps：本人语法及其的烂
有一句是 As no pumas had been reported missing from any zoo in the country,this one must have been in the possession of a private collector.
对于肯定推测 have been 是死也不能改的吗? has 可否?
ps：本人语法及其的烂
情态动词+完成时态,表示对过去发生的事情一种推测、懊悔等等的态度,情态动词后面是跟动词原型的,所以must后不可能 是has.
he shouldn't have cheated in the exam.考试时他不应该作弊的.（他作了弊）
he shouldn't have cheated in the exam.考试时他不应该作弊的.（他作了弊）