名词性从句中的虚拟语气

　　( 1 ) It is demanded (requested/required/insisted/suggested/proposed...) /important(essential/necessary/natural/imperative...) / a pity (a shame/no wonder...) + that...等结构的主语从句，谓语动词用 should 加动词原形，should 可省略。

　　例如：

　　It is demanded that the president (should) make measures to end the economic recession.

　　人们要求总统应该采取措施阻止经济衰退。

　　It is necessary that he (should) go to see a doctor. 他应该去看医生，这是必要的。

　　It is a pity that he (should) fail to come to the party.他没能参加这个聚会，真是遗憾。

　　(2)用于宾语从句中

　　在表示命令、建议、要求(如 demand, command, request, require, insist, suggest, propose, order, recommend)等一类动词后面的从句中，谓语动词用 should 加动词原形，should 可省略。

　　例如：

　　I suggest that we (should) hold a meeting next week.我建议下周召开个会议。

　　He insisted that he (should) be sent there.他要求被派到那儿去。

　　注意：若 suggest，insist 用于其本意“暗示、表明”“坚持认为”时，宾语从句用陈述

　　语气。例如：Your pale face suggests that you are ill./ I insisted that you were wrong.

　　( 3 )demand/command/request/requirement/insistence/suggestion/advice/proposal/recom-mendation/idea/plan/order 等表示要求、建议和命令等名词后面的表语从句、同位语从句中的动词要用虚拟语气，即(should)+动词原形。

　　例如：

　　My idea is that we (should) get more people to attend the conference.

　　我的想法是让更多的人来参加会议。