老师：hello， everybody im Yang meihua from highly middle school welcome to my online class grammar of unit four in todays， lesson we are going to talk about how to use imperative sentences to give instructions and how to use should and had better to give advice lets have a check， please watch carefully and try to say out what you will see ready go？
老师：what appeared on the screen？ yes some words am a phrase， have better sentence s e n t e n c e sentence make a sentence in English，should， scissors be careful with scissors， d i y do a d i y job， c u t cat， cat card cut out a pieces of card with a pair of cedars draw draw a picture about the sentence on the other side of the card， here are four sentences。
学生：请同学们仔细观察这 4 个句子，并说出它们之间的异同之处。
学生：我们不难看出，这 4 句都是陈述句。其中第二句和第四句是省略了主语的起始句。第一句和第三句表示提出建议，第2句和第4两句表示提出请求，要求发出指令。
学生：在第二句和第四句当中，我们看到了 please 表示语气的委婉。
老师：lets come to grammar a， giving instructions。
老师：Attention, please. We start a sentence with the baseball of a verb when we want to tell people what to do. For example, put up a picture on the wall. Besides, we add do not or don't in front of a verb. When we want to tell people not to do something, for example, don't paint the cat. What's more, we often add please in a sentence to make an instruction more polite. Another example, please fix the shelf for me.
老师：Here is a guessing game for you. Please try to use one sentence or more to give instructions. What does the sign mean? Yes, don't smoke. No smoking. It tells a request. What about this sign? It means don't play football. It gives another. This sign tells people to left. It tells the way.
老师：This side means no parking. Please don't park your car here. What else? Yes, no one can park the car here. You shouldn't park your car here.
老师：Please don't park your car here. What does this mean? Yes, be quiet. Please don't make any noise. What else? no talking stop talking you shouldnt talk here no one can talk here do you agree， go upstairs go downstairs， the two signs also tells the way， please read an Abdul。
学生：请同学们阅读并观察下面的两组句子。很显然，左边一组是肯定祈使句，右边一组是否定祈使句的否定式的构成是在动词原型前加do， not 或者dont。让我们一起来看看祈使句的概念，即使句表示请求或命令等。它的主语是you，通常不说出祈使句。肯定结构中的谓语动词一律用动词原形，句末用惊叹号或句号。二起始句的结构。祈使句的肯定结构有 3 种，第一种以行为动词原形开头的独有行为。第二种以 b 开头的 e 行为。第三种。
老师：以 let somebody。
学生：do something 形式出现的 let 型。请注意。
老师：lets 是 let us 的简略。
学生：式。请比较以下两个百亿疑问句，依据中的 less 表示，咱们包括说话者本人，主语应该是we，第2句 let us 表示让我们主语 you 被省略。所以这两句的反义疑问句的第二部分应该。
老师：是小微 where you。
学生：第一句表示建议，第2句是向对方提出请求。起始句的否定结构一律在肯定结构前加 do not 或者dont，有些可以用 no 开头用来表示禁止性的祈使句。顺便提示一下起始句的反义疑问句的构成，除了 lets 句式用小we，其余部分全部用。
老师：where are you？ for example be here on time， tomorrow will you。
学生：即肯定回答 yes i will 偶定回答 no i wont。
学生：让我们来看看祈使句的口诀。祈使句无主语，只用动员就可以表示请求或命令，加上 please 表客气。如果变成否定句， dont 开头是规律 let us 和 let s 有异同，分清对象靠句意。
老师：N
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