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Module1Unit1Don’ttouchthemachines,please!factoryWelcometoourfactory,children.machinemachinesWhatdothesemachinedo?Thesemachinesmakecrisps.Thesemachines•crispsmakeWhatdoesthismachinedo?Itwashesthepotatoes.potatoesWhatdoesthismachinedo?•Thismachinecutthepotatoes.scutthepotatoesWhatdoesthismachinedo?Thismachineputthecrispsinthebags.stouch•Don'ttouchthemachines!•Theyare•dangerous.dangerousDon’ttouchthemachine!祈使句：表示请求或命令的句子。谓语动词没有时态和数的变化。祈使句的结构：1、肯定：以动词原型开头，please可放在开头或结尾。放在结尾需用逗号跟前面分开。例句：Openthedoor!Pleaseopenthedoor!Openthedoor,please!Wearthehat!Weartheglasses!Washyourhands!2、否定：以don’t开头后接动词原型。Don’topenthedoor!Don’topenthedoor,please!Don’ttalk!Don’ttouch!Don’tswimhere!Don’twalkhere!Don’tclimbhere!