should have been doing表示什么情况?
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should have been doing表示什么情况?
should have been doing表示什么情况?
should have been doing表示什么情况?
过去完成进行时
加上 should 表示对过去某种动作的推测
比如说 :
她昨天中午应该一直在图书馆呆着来.
she should have been staying in the library yesterday noon .
have been doing有这样的语法么?活了这么久还没见到,N年前在高中改错时倒是见过
语法里只有have been done 和 been doing
不论是过去完成时,还是过去进行时,加了should就是表示猜测。
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