1）Itisdemanded/necessary/apity+that…结构中的主语从句的谓语动词要用should加动词原形，should可省略。句型：
(1)suggested
Itis (2)important that…+(should)do
(3)apity(1)suggested,ordered,proposed,required, demanded,requested,insisted；+(should)do
(2)important,necessary,natural,str ange
apity, ashame, nowonder
(3)Itissuggestedthatwe(should)holdameetingnextweek. Itisnecessarythathe(should)cometoourmeetingtomorrow.
2）在宾语从句中的应用
在表示命令、建议、要求等一类动词后面的从句中。
order,suggest,propose,require,demand,request,insist,command,insist+(should)do
Isuggestthatwe(should)holdameetingnextweek.
Heinsistedthathe(should)besentthere. 注意：如suggest,insist不表示"建议"或"坚持要某人做某事时"，即它们用于其本意"暗示、表明"、"坚持认为"时，宾语从句用陈述语气。
Theguardatgateinsistedthateverybodyobeytherules.
判断改错:
（错） Youpalefacesuggeststhatyou(should)beill.
(对) Yourpalefacesuggeststhatyouareill.
(错) Iinsistedthatyou(should)bewrong.
(对) Iinsistedthatyouwerewrong.3）在表语从句，同位语从句中的应用
在suggestion,proposal,idea,plan,order,advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。
Myideaisthatwe(should)getmorepeopletoattendtheconference.
Imakeaproposalthatwe(should)holdameetingnextweek.
