8A Unit 4 Do it yourselfGrammar Imperative sentence(祈使句祈使句) ---用于表示向对方提出请求、命令、劝告用于表示向对方提出请求、命令、劝告等等v祈使句的肯定形式：祈使句的肯定形式： --- “动词原形动词原形”开头开头(主语主语you)通常被省略通常被省略. 例：例：Please fix the shelf for me (为我修理架子为我修理架子), please. Put up (张贴张贴) a picture on the wall, please. Paint the walls blue. (将墙壁涂成蓝色将墙壁涂成蓝色)v祈使句的否定形式祈使句的否定形式 --- “Don’t + 动词原形动词原形” 开头开头 例：例：Don’t paint the cat. Don’t waste your money like that. Don’t touch the wet paint, please. vFinish exercises on P47. How to make cards1.____ out pieces of card with a pair of scissors.2._____ some words or a sentence on each card.3._____ a picture about the words or sentence on the other side of the card.4._____ at the picture and ____ to say what is on the other side.5.Please_________ up. _____ trying and you will find you can remember things better.CutWriteDrawLooktrydon’t giveKeep vYou have got a cold(感冒了感冒了). You should go to see the doctor. You had better go to see the doctor. should 情态动词情态动词用于表达用于表达“建议、或职责建议、或职责”，意为，意为“应该应该”。
意思与意思与had better 相近，但语气比相近，但语气比had better 弱一些v陈述句：陈述句：should + 动词原形动词原形 例：例：We should do exercise every day.v疑问句：疑问句：should 提前提前 例：例：---Should you do exercise every day? ---Yes, we should. / No, we shouldn’t.v否定句：否定句：should not / shouldn’t + 动词原型动词原型 例：例：We shouldn’t do exercise every day. had better 情态动词情态动词表示一种建议和劝告，意思是表示一种建议和劝告，意思是“最好最好…”、、“还是还是…好好”v人称和数的形式：人称和数的形式： had better中中had无人称、数和时态的变化无人称、数和时态的变化v缩写形式：缩写形式： had better可以与作主语的人称代词缩写可以与作主语的人称代词缩写 如：如：I’d better，，You’d better等。
等 v肯定句形式肯定句形式：：“主语主语+had better+动词原形动词原形+…” 例：例：It‘s raining outside. You’d better bring your raincoat． 外面在下雨，你最好穿上雨衣外面在下雨，你最好穿上雨衣v否定句形式：否定句形式：“主语主语+had better not+动词原形动词原形+…” 例：例： You had better not wake me up before 6 a.m. 六点钟之前你最好不要叫醒我六点钟之前你最好不要叫醒我 v一般疑问句形式一般疑问句形式: Had +主语主语+ better+动词原形动词原形 +…？？ 例：例：--Had we better leave early ? 我们是不是最好早些离开？我们是不是最好早些离开？ --Yes, we’d better. / No, we’d better not. 不，我们最好不要早离开不，我们最好不要早离开v特殊疑问句形式：特殊疑问句形式：“疑问词疑问词+had+主语主语+better+动词动词 原形原形+…?” 例：例：What had we better do ? 我们最好做些什么呢？我们最好做些什么呢？ vFinish exercises on P48. Homework: Finish off the exercises. 。