英语中，祈使句是表示命令、请求或建议的句子。而当我们想表达相反的意思时，可以把祈使句改为否定句。下面是一些常见的祈使句改为否定句的例子：
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祈使句：Shut the door. 否定句：Don't shut the door.
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祈使句：Clean the room. 否定句：Don't clean the room.
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祈使句：Take a seat. 否定句：Don't take a seat.
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祈使句：Turn off the lights. 否定句：Don't turn off the lights.
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祈使句：Open the window. 否定句：Don't open the window.
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祈使句：Be quiet. 否定句：Don't be quiet.
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祈使句：Study hard. 否定句：Don't study hard.
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祈使句：Speak English. 否定句：Don't speak English.
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祈使句：Eat your vegetables. 否定句：Don't eat your vegetables.
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祈使句：Meet me at the park. 否定句：Don't meet me at the park.
以上是一些常见的祈使句改为否定句的例子。当我们需要表达相反的意思时，可以使用这些句子来传达我们的意思。希望这些例子能够帮助大家更好地掌握英语知识。
