[八年级英语]河南省郑州市第九十六中七年级英语 Unit 12 Don’t eat in class Section A 2课件

1、单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级* Unit 12Dont eat in class. Grammar肯定祈使句Sit down.Come in.Eat at home.否认祈使句Dont sit down. Dont come in. Dont eat at home.祈使句是一般以动词原形开头，向听话者发出请求、命令，提出要求或建议等的句子。这类句子的主语常是第二人称you,也就是听话者,因而you常省去了。Listen to music outside. Dont listen to music outside.Do your homework a

2、t school. Dont do your homework at school. Comehereontime! 准时来到这里！ Dontlookoutofthewindow. 不要向窗外看。 Be quiet!祈使句的肯定形式: 动词原形+其他祈使句的否认形式：Dont+动词原形+其他为表礼貌，常在句前或句末加please, 句末时please前加逗号。拓展2. Let sb +动原+其他. let sb not +动原+其他 Dont let sb +动原+其他 3. 以no开头的，表禁止，常用语公共场所 No smoking! No fishing! classroomuniform

3、3a Fill in the blanks with the correct words.uniformclassroomsports shoessports shoeshave to与一般情态动词的异同相同点：不能单独作谓语，后面必须接动词原形一起构成谓语。Explanation不同点： 1、一般的情态动词没有人称和数的变化，而have to 有人称和数的变化。可用于多种时态中： 一般现在时中当主语是第三人称单数时要 用has to，其余的人称用have to，一般过 去时中要用had to。如： She has to go to school by bus. 她不得不乘公汽上学。 We h

4、ave to go to school by bus. They had to go to school by bus at that time.Explanation2、否认句和疑问句的构成方式不同： 一般的情态动词直接在后面加not构成否认句， 把这些情态动词提到句首就构成一般疑问句。 而have to 的否认句和疑问句的构成往往要借助 于助动词do的适当形式，即have to, has to, had to的否认式分别为dont have to, doesnt have to, didnt have to，疑问句是在句首加助动词do/does/did,句中复原成have to。 如: W

5、hat does she have to do? 她必须做什么？ You didnt have to wait for me yesterday. 昨天你没有必要等我。 must表说话人主观看法，无人称和时态变化 Its 8 oclock. I must go home. I neednt go home. 不需要must not= mustnt 禁止，不允许Explanation3.hear, listen和sound都有“听的意思, 但三者是有区别的。hear “听说, 侧重于“听的内容。Imsorrytohearthatyouareill. 听说你生病了, 我很难过。Listentome

6、carefully. 认真听我说。Thechildrenliketolistentomusic.孩子们喜欢听音乐。Ineverheardsuchaninterestingstory. 我从来没听过这么有趣的一个故事。(2) listen“听侧重于“听这一动作。(3) sound“听起来,它是系动词, 后面接形容词等。 Thatsoundsgreat. 那听起来真不错。 Itsoundslikefun. 听起来挺有趣。4.arrivelatefor与belatefor意思相近, “迟到 Dontarrive/be lateforschool. 上学别迟到。 Iarrived/was late f

7、or the meeting yesterday. 我昨天开会迟到了。5.Notalking!“禁止交谈！ no后面加上名词或动名词(doing) 也表示不要做某事, 与dont+do的用法相似。Nowetumbrellas!Dontputwetumbrellasher.禁止放湿雨伞！Nofood!/Donteatfoodhere!禁止吃食物！Nosmoking!/Dontsmokehere!禁止吸烟！6. What else do you have to do?else “其它的, 用来修饰something, anything , nothing等, 还可修饰疑问词 what, where

8、, who等, else修饰疑问词或不定代词时, 应后置。例如:Do you have anything else to do .Who else did you see?Where are the other girls? (放在修饰的名词前) late, dont, for school, arrive2. music, listen to, in the classroom, dont3. eat, cant, in the classroom, we Dont arrive late for school. Dont listen to music in the classroom. We cant eat in the classroom.ExersicesForm sentencesB: Put the following i