被动语态 什么时候是用原形 be+p.p
问题描述：
被动语态 什么时候是用原形 be+p.p
例如；She insisted that she heard someone in the house and that a policeman be called in to make sure.为什么这句话的后半句不是用 a policeman was called in to make sure
答
insist 从句中,1.insist表示“坚持”,陈述一个客观事实的时候,用陈述语气.例句：Mike insisted that the car hadn't come yet.2.insist表示"坚决主张、认为,坚持说"的意思时,要用虚拟语气,即insist that +(should) b...