he looked as thoughhe___ill for a long time.were has been为什么用were 不用has been

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/02 23:19:14
he looked as thoughhe___ill for a long  time.were    has been为什么用were  不用has been

he looked as thoughhe___ill for a long time.were has been为什么用were 不用has been
he looked as thoughhe___ill for a long time.
were
has been
为什么用were 不用has been

he looked as thoughhe___ill for a long time.were has been为什么用were 不用has been
这里的were 不是时态中的过去式,是一种虚拟语气,表示推测.(详见英语语法中虚拟语气部分)不能和has been 比较.