哪些动词后的that从句用should+动词原型

Answer 1

1）在主语从句中的应用

It is demanded / necessary / a pity + that…等结构的主语从句，谓语动词用should 加动词原形，should 可省略。可用的词有三类

It is+
（1）suggested, ordered, required, proposed, demanded, requested, insisted等
（2）important, necessary, natural, imperative, strange等
（3）a pity, a shame, no wonder等
+that（should）do

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，像order, suggest, propose, require, demand, request, insist, command, insist + （should） do等。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：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。
判断改错： （错） You pale face suggests that you（should）be ill.
（对） Your pale face suggests that you are ill.
（错） I insisted that you（should）be wrong.
（对） I insisted that you were wrong.
3）在表语从句，同位语从句中的应用
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。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。
I make a proposal that we（should）hold a meeting next week.我提了个建议，下周我们开个会。

Answer 2

现在时)if+主语+were/did/were doing 主语+should/would+do
(过去时)if+主语+had gone 主语+should/would+have done
(将来时)与现在时一样
其它从句用法:would/should+动词原型

Answer 3

It is+
（1）suggested, ordered, required, proposed, demanded, requested, insisted等
（2）important, necessary, natural, imperative, strange等
（3）a pity, a shame, no wonder等
+that（should）do

Answer 4

那是虚拟结构啊