一道英语题（虚拟语气）He ____ busy yesterday,or he ___ you with your experiment.was,would have helped
问题描述：
一道英语题（虚拟语气）
He ____ busy yesterday,or he ___ you with your experiment.
was,would have helped
答
He __was__ busy yesterday,or he _would have helped __ you with your experiment.
前面的句子发生在过去,所以要用过去时态.后面是虚拟的,并没有发生,所以用would have done