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去洗你的手请开门。我们去电影院吧左转请安静请坐下肯定肯定祈使句的结构如下：祈使句的结构如下： Do (动词原形动词原形) sth,please. 不要洗你的手请不要开门。不要左转不要安静不要坐下否定否定祈使句的结构如下：祈使句的结构如下： Dont do sth. 肯定结构: 1. Do型(即:动词原形(+宾语)+其它成分)。如:Please have a seat here. 请这边坐。 2. Be型(即:Be + 表语(名词或形容词)+其它成分)。如:Be a good boy! 要做一个好孩子! 3. Let型(即:Let + 宾语 + 动词原形 + 其它成分)。如:Let me help you. 让我来帮你。 否定结构: 1. Do型和Be型的否定式都是在句首加dont构成。如:Dont forget me! 不要忘记我! Dont be late for school! 上学不要迟到! 2. Let型的否定式有两种:“Dont + let + 宾语 + 动词原形 + 其它成分”和“Let + 宾语 + not + 动词原形 + 其它成分”。如:Dont let him go. / Let him not go. 别让他走。 3. 有些可用no开头,用来表示禁止性的祈使句。如:No smoking! 禁止吸烟!No fishing! 禁止钓鱼! 祈使句，无主语，只要动词就可以；祈使句，无主语，只要动词就可以； 表示请求或命令，加上表示请求或命令，加上pleaseplease表客气；表客气； 如果变成否定句，如果变成否定句，DontDont开头是旋律；开头是旋律； NO talking NO talking ！是警示，祈使用法要！是警示，祈使用法要牢记！牢记！轻松小练习2.请不要迟到. 3.回答这个问题. Lets play together! 2.Dont be late. 3.Answer this question. 4. Open the window Turn left!Guessing GameTurn right!Guessing GameGuessing GameDont smoke!No smoking!Guessing GameDont play football!Guessing GameDont park your car!Guessing GameDont eat!Guessing GameDont pick the flowers! Go upstairs!Guessing GameGuessing Game Go downstairs!第一关：第一关：Lets Read Dont throw things at the monkeys. Dont feed the animals. Dont walk on the grass. Dont take photographs here. Dont leave litter.第二关第二关Lets Say You cant sleep on the desk. Dont _ on the _. You cant climb trees in the park. Dont _. You cant sit on the grass. _.sleepdeskclimb trees in the parkDont sit on the grass第三关第三关 Lets Write第四关 Play a game: Look and guessNo smokingDont touchDont eat./Dont drink.No parkingBe quietLets do exercise.1. Jim, _ me a hand. A. gives B. is giving C. will give D. give2. _ careful, Jenny! There is a tree in front of you. A. Am B. / C. Be D. Was3. Lets _ our time. A. not waste B. no wasting C. not to waste D. no waste4. _ higher, and you will see the house. OK. A. If you stand B. To stand C. When you stand D. Stand5. Please _ do it. A. he B. let him C. let he D. him6. _ let anyone open the door. A. Dont B. Will C. Not D. NoLets do more exercises.1. _ forget to write to me. A. Dont B. Please 2. _ careful! A. Be do B. Be C. Not D. Not do3. _ let anyone open the door. A. Dont B. Will C. Not D. NoBBA4. _ get off the lorry until it stops. A. Do B. Cant C. / D. Dont
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