Get up and dress quickly. 起来，快穿好衣服。
Sit down, please.请坐！
Let’s go shopping. 去购物吧！
Try holding your breath to stop sneezing. 试着屏住呼吸以止住打喷嚏。
祈使语气的否定式有时用never引起。如：
Never put off till tomorrow what you can do today. 今日事，今日毕。
Never trouble trouble till trouble troubles you. 不要无事惹事。
Never speak to me like that again. 决不要再那个样子跟我说话。
1、陈述语气，它用来陈述事实，描述实际。动词可以是任何时态。可以是陈述句或疑问句。
Who was the last one to leave?最后一个离开的是谁？
2、虚拟语气，表达一个假设动作或不真实的情况。它与陈述语气相反。
虚拟语气的语法结构明显不同于陈述语气：
I would buy a house instead of a flat.如果我是个有钱人，我会买房子而不是公寓。
3、祈使语气。说话者向对方直接请求或命令时，用祈使语气，祈使语气用现在时态或将来时态。
Hand out the exercise books please.请把练习本发下去。
I want to ride my bicycle to school.我想骑自行车上学。
虚拟条件句：
条件状语从句是非真实情况，在这种情况下要用虚拟语气。
1、条件从句与现在事实不一致，其句型为：
句型1：If ＋主语＋过去时，主语＋ should (could, would, 或might) ＋动词原形
(1) If I were you, I would study hard.
(2) If it rained, I would not be here now.
2、条件从句与过去事实不一致，其句型为：
句型2：If ＋主语＋had＋过去分词，主语＋ should（could, would, 或might）＋ have ＋过去分词
(3) If the doctor had come last night, the boy would have been saved.
(4) If I had not studied hard, I would have failed in the exam last term.
3、条件从句与将来事实不一致，其句型为：
句型3：If ＋主语＋过去时/ should ＋动词原形/ were to＋动词原形，主语＋ should (could, would, 或might) ＋动词原形
(5) If it should rain tomorrow, we would stay at home.
(6) If I were to go to the moon one day, I could see it with my own eyes.
(7) If you missed the film tonight, you would feel sorry.
