1） it is demanded / necessary / a pity + that…結(jié)構(gòu)中的主語(yǔ)從句的謂語(yǔ)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)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）在賓語(yǔ)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(yǔ)從句用陳述語(yǔ)氣。
　 the guard at gate insisted that everybody obey the rules.　

　判斷改錯(cuò):
�。ㄥe(cuò)）　you pale face suggests that you (should) be ill.
　 (對(duì))　 your pale face suggests that you are ill.
　 (錯(cuò))　 i insisted that you ( should) be wrong.
　 (對(duì))　 i insisted that you were wrong.

3）在表語(yǔ)從句，同位語(yǔ)從句中的應(yīng)用
　　在suggestion, proposal, idea, plan, order, advice等名詞后面的表語(yǔ)從句、同位語(yǔ)從句中要用虛擬語(yǔ)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.