1) It is demanded / necessary / a pity + that…結(jié)構(gòu)中的主語從句的謂語動(dòng)詞要用should 加動(dòng)詞原形， should 可省略。

　　句型：

　　(1)suggested

　　It is　 (2)important　　　　that…+ (should) do

　　(3) a pity

　　(1)suggested, ordered, proposed, required,　 demanded, requested, insisted; + (should) do

　　(2)It is suggested that we (should) hold a meeting next week.

　　It is necessary that he (should) come to our meeting tomorrow.

　　(3)important, necessary, natural, strange

　　a pity,　 a shame,　 no wonder

　　(3)It is suggested that we (should) hold a meeting next week.

　　It is necessary that he (should) come to our meeting tomorrow.

　　2)在表語從句，同位語從句中的應(yīng)用

　　在suggestion, proposal, idea, plan, order, advice等名詞后面的表語從句、同位語從句中要用虛擬語氣，即(should)+動(dòng)詞原形。

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

　　I make a proposal that we (should) hold a meeting next week.

　　3)在賓語從句中的應(yīng)用

　　在表示命令、建議、要求等一類動(dòng)詞后面的從句中。

　　order, suggest, propose, require, demand, request, insist, command, insist + (should) do

　　I suggest that we (should) hold a meeting next week.

　　He insisted that he (should ) be sent there.

　　注意： 如suggest, insist不表示"建議" 或"堅(jiān)持要某人做某事時(shí)"，即它們用于其本意"暗示、表明"、"堅(jiān)持認(rèn)為"時(shí)，賓語從句用陳述語氣。

　　The guard at gate insisted that everybody obey the rules.

　　判斷改錯(cuò):

　　(錯(cuò))　 I insisted that you ( should) be wrong.

　　(對(duì))　 I insisted that you were wrong.

　　(錯(cuò))　You pale face suggests that you (should) be ill.

　　(對(duì))　 Your pale face suggests that you are ill.