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课件网) Unit 2 No rules, No order Section A Grammar Don't let them in, Don't let them see Be the good girl you always have to be Conceal, don't feel, Don't let them know Well, now they know Let it go, let it go Can't hold it back anymore Let it go, let it go Turn away and slam the door I don't care what they're going to say Let the storm rage on The cold never bothered me anyway Watch and sing Don't let them in, Don't let them see Don't let them know Turn away and slam the door Let it go, let it go Let it go, let it go Be the good girl you always have to be What kind of sentences are they Do型 Be型 Let型 Watch and think 祈使句 (Imperative sentences) Walk in the hallway. Don’t run! Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter. Can we bring our phones to class No, we can’t. We must keep them in our lockers. Can we eat snacks in class No, we can’t eat in class. We have to eat in the dining hall. Read the sentences. Do the verbs in bold need to change forms Why 3a Imperative Sentences 1. 什么是祈使句？ 祈使句一般用来表示命令、请求、劝说、号召、警告、禁止等。 Imperative Sentences 2. 祈使句的特点？ 通常省略主语you 其肯定形式常以动词原形开头，否定形式是在动词原形前加don’t。 更礼貌，前面或后面加please Imperative Sentences 3. 祈使句的类型？ 肯定式 Turn back! Go to bed now! Do型：动词原形+其他 Be quiet, please! Be careful! Be型：Be+其他 Let’s go! Let’s have a rest! Let型：Let sb do+其他 Imperative Sentences 3. 祈使句的类型？ 否定式 Don’t be late! Don’t smoke here! Don’t let him leave! Don’t型 Don’t be+其他 Don’t do+其他 Don’t let+其他 No photos! No smoking! No型 No+n. No+v.ing Imperative Sentences Summary 祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中，通常省略主语you，其肯定形式以动词原形开头，否定形式是在动词原形前加don’t。祈使句句尾用句号或感叹号，读时用降调。为表示礼貌，可以在句首或句尾加上please。句末用please时，前面通常加逗号。 Let’s practice Don’t be 1. It’s an important meeting. (not, be) late. 2. (not, make) any noise! Your mother is sleeping. 3. (not, talk) and (read) aloud. 4. The notice on the wall says “ ”. (no smoke) 5. (look) out! A car is coming. 6. (not, let) the baby cry. 7. Let’s (not say) anything about it. Don’t talk Don’t make read No smoking Look Don’t let not say Walk in the hallway. Don’t run! Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter. Can we bring our phones to class No, we can’t. We must keep them in our lockers. Can we eat snacks in class No, we can’t eat in class. We have to eat in the dining hall. Read the sentences. Do the verbs in bold need to change forms Why 3a 1 情态动词没有除了have to之外，其余没有人称和数的变化 2 情态动词后跟动词原形 特点 情态动词 Modal Verbs 情态动词用于表达说话人的态度、意愿、推测、建议、能力、义务等。 一、 情态动词can的用法 Can we bring our phones to class No,we can’t. We must keep the ... ...
