(课件网) Section A Part 2 Section A (Grammar Focus－3c) Unit 4 Don't eat in class. 英语 祈使句 (一)祈使句的定义 祈使句一般用来表示请求、命令、建议、警告等。祈使句的对象(主语)是第二人称you，通常被省略。句末用感叹号或句号，朗读时常用降调。在表达请求或劝告时，可在祈使句前或句末加上please，使句子的语气更加委婉或客气。祈使句一般没有时态的变化，也不能与情态动词连用。 语法导学 (二)祈使句的形式 ◆肯定祈使句 (1)Do 型 ——— 动词原形(＋ 宾语)＋其他成分 如：Open the door，please. 请打开门。 (2)Be 型 ——— Be＋ 表语(名词或形容词)＋其他成分 如：Be careful when you come across the street. 过马路时要小心。 (3)Let 型 ——— Let ＋ 宾语 ＋ 动词原形 ＋ 其他成分 如：Let's go traveling. 咱们去旅游吧。 语法导学 ◆否定祈使句 (1)Do 型和Be 型的否定式，在句首加Don't 或Never。 如：Don't be late again. 不要再迟到了。 Never forget me！ 别忘了我！ (2)Let 型的否定式分两种： ①let开头的祈使句，如果后面接第一、第三人称名词或代词的宾格，可在let前加don't，也可在let后宾格的名词或代词后面加not。 语法导学 如：Don't let me go with him tomorrow.＝Let me not go with him tomorrow. 明天不要让我和他一起去。 ②如果是以let's开头的祈使句，必须在let's后面加not。 如：Let's not go swimming there. 我们别去那里游泳吧。 (3)No＋名词或动词 －ing形式，表示禁止做某事。 如：No photos！ 禁止拍照！ No talking！ 禁止说话！ 语法导学 ———基础夯实——— 一、单项选择。 ( )1.— Excuse me，can you tell me where the nearest bank is — Just _____ going for two more blocks and you'll see it. A．keep B．to keep C．keeping D．keeps ( )2._____ so fast in the hallways.It's dangerous. A．Not run B．No run C．Don't run D．Doesn't run 语法导练 A C ( )3.—_____be late for school，Tom! — Am I late There are five minutes left，I think. A．Couldn't B．Don't C．Mustn't D．Can't ( )4.— Let's _____to the movies now. — That_____ great. A．going；sounds B．go；sounds C．go；sound D．going；is sounds ( ) 5.— Does Tom have to take the bus to school — _____.That's because he can't ride a bike and it's too far. A．Yes，he has B．Yes，he does C．No，he hasn't D．No，he doesn't 语法导练 B B B 二、用所给单词的适当形式填空。 1．Please don't be _____(noise)．The baby is sleeping. 2．Please remember _____(bring) your notebook here tomorrow. 3．_____ (not arrive) late for work. 4．Do you have to _____(wear) school uniforms every day 5．“Please be quiet.No _____ (talk)！” my teacher says. 语法导练 noisy to bring Don't arrive wear talking 三、完成句子。 1．He has to practice the piano every day.(改为一般疑问句) 2．They have to listen to music in the music room.(就画线部分提问) 3．Close the window，please.(改为否定句) 语法导练 Does he have to practice the piano every day What do they have to do in the music room Don't close the window, please. 4．You can't wear a hat in class.(改为祈使句) 5．请给我拿一杯牛奶。 Please _____ a glass of milk _____ me. 语法导练 Don't wear a hat in class bring to 语法导练 ———能力提升——— 四、语法选择。 Many students like watchin ... ...
