4.“it is sb's advice+that”从句中

“It is/was sb's advice/proposal/suggestion/decision/order/arrangement/ recommendation/idea/advice”等结构后的主语从句中要用虚拟语气，即“should+动词原形”或只用动词原形。

It was our proposal that the meeting be postponed．

我建议会议延期。

It was their decision that the criminals be severely punished．

他们决定，罪犯应从严惩办。

It was my suggestion that the girls should stay behind．

我建议女孩子们留下来。

It was the commander's order that we not open fire．

将军命令我们不开火。