祈使句
省略了主语
没有时态变化
【例句】
Follow the doctor's advice and you will be better in a few days.
祈使句+and +将来时 句首——动词原形
动词原形+其他
Don't/Never+动词原形+No+名词/V—ing形式
【例句】
No parking!
肯定句: Be / Do / Let
否定句：Don't No/Never
【例句】
May I take some picture here?
——Sorry you mustn't please look at the sign. It says“No photos”.
Please be quiet , because this is a reading room.
Don't be late for school again, Bill!
Work hard and you will pass the exam.
你要好好学习，你就会通过考试。
spread 传播
emperor n.皇帝
Rome 罗马
place 宫殿
freeze v.冰冻
