1)I wish I knew the key to the answer.

2)I wish I were ten years younger.

3)I wish that I had gone to the football match last week.

4)I wish that you had been here yesterday.

5)He wishes that we would visit the old school.

7.表示命令或建议动词suggest, insist, propose, desire, demand, request, order, command 后的宾语从句中应使用虚拟 should +动词原形；should 不可用would 来替代; 主句所使用的动词时态不限。

8.suggest 为“建议去做…; 命令…”从句用should + do

为“ 说明； 暗示”, 从句用过去时或过去完成时。

1) The doctor suggested that I should take the medicine three times a day.

2) The doctor suggested that my grandmother had caught a bad cold.

9.insist “坚持要去做…，坚持应该去做”，从句用should + do为“坚持表明，坚持说/解释”， 从句用过去时或过去完成时。

10.虚拟语气也用于表语从句和主语从句中，表示间接的命令、要求、请求、建议、决定等，主句的主语通常是suggestion, proposal, request, order, idea 等。表语从句中的谓语动词是should +动词原型，should 可以省略。

11.在主语从句中，当从句用来表示惊奇、不相信、惋惜等，从句的谓语动词用需拟语气形式。其谓语动词时should + 动词原型， 或should 省略。