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虚拟语气人称代词后be动词的形式

来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/17 11:07:49
虚拟语气人称代词后be动词的形式
一律都用were吗?
是用 were
虚拟语气在条件句中的用法:
1.与现在事实相反
主句时态:Should\would\could\might+do(动词原形)
从句时态:过去式(be动词各人称都用were)
例句:If I were you,I should \would make full use of my time to study.
2.与过去事实相反
主句时态:Should\would\could\might+have done(动词过去分词)
从句时态:Had+done(过去分词)
例句:If you had come earlier,you would have met him.
3.与将来事实相反
主句时态:Should\would\could\might+do(动词原形)
从句时态:(可以使用下列其中之一时态)
a.过去式(be动词各人称都用were)
b.should+动词原形
c.were to +动词原形
例句:If it rained \should rain\were to rain tomorrow,the crops would be saved.