(3) 表示主观判断,推测,建议,命令, 要求的动词其宾语从句常用虚拟语 气,谓语动词用should + V原形,且 should可以省略。 I recommend that you all be diligent if you want to pass the exam. 类似用法的单词还有: suggest/insist/propose/require/insist/ command/demand etc.