1. 祈使句谓语用动词原形
Watch your steps.
走路小心！
Be quiet!
保持安静！
Come earlier next time.
下次早点来。
Have a good trip.
旅途愉快。
2. 肯定变成否定
Don't worry.
别担心。
Don't speak so loud.
别这么大声说话。
Don't walk on the grass.
不要在草坪上走。
Don't lose the key.
别把钥匙丢了。
3. 与please连用
Please don't get angry.
请不要生气。
Please drive more slowly.
请开慢一点。
Please cut me a piece of cake.
请给我切一块蛋糕。
Please try to be quiet.
请设法保持安静。
4. 以let开头的祈使句
Let me have a try.
我来试一试。
Let me show you how to do it.
我来告诉你怎样做。
Let's go out to have dinner together.
我们一起出去吃饭吧。
Let's paint it ourselves.
我们自己来刷漆。