四级语法——虚拟语气（在线收听）

1) wish, would rather (sooner), had better: 

I wish I were as strong as you. 

I wish I had paid more attention to our pronunciation. 

I wish I remembered the address. 

I would rather they came tomorrow (you had gone there too). 

I had rather (that) you told him than I did. 

2) suggest, order, demand, propose, command, request, desire, insist 等动词后的宾语从句: 

The commander ordered that all civilians (should) be evacuated. 

He asked that he be given an opportunity to try. 

She urged that he write and accept the post. 

3) it is desired, it is suggested, it is requested, it was ordered, it was proposed, it is necessary, it is important, it has been decided 等结构后的主语从句中. 

It was arranged that they leave the following week 

It will be better that we meet some other time. 

4) suggestion, motion, proposal, order, recommendations, plan, idea等后面的表语从句和同位语从句: 

His sole requirement is (was) that thy system be adjusted.