Unit7 Grammar课件 2022-2023学年沪教牛津版英语七年级下册

Module 4 Colourful life Unit 7 Poems Grammar Presentation Imperative sentences （祈使句） 含义： 表示请求、命令、建议、劝告和号召等 结构： 肯定形式：以动词原形开头 否定形式：以 don’t + 动词原形开头 Presentation eg. Give me another chance. 再给我一次机会吧。（表请求） 　 Don’t forget to turn off the lights before you leave the lab. 离开实验室前别忘关灯。（表命令） 　 Don’t be nervous. 别紧张。(表建议) ★除了以上语法规则之外，一般还在以下两种情况下用祈使句。 1. 紧急状况。 e.g. A girl fell into the lake. Help! Help! 一个女孩掉进湖里了。救 命啊！救命啊！ 2. 欢呼喝彩。 e.g. Come on, Peter! Make another goal! 加油，彼得！再进一个球！ a. 祈使句是一种具有较强交际功能的句型。为了缓和语气，使表达更礼貌、更委婉，常在句首或句末加上 please。 e.g. Please call me when you get home. 到家后请给我打电话。 e.g. Go this way, please. 请走这边。 b. 祈使句的强调句型为 Do+ 动词原形 + 其他部分。 e.g. Do help me with this Maths question, please. 请务必帮我解答这道数学题。 Presentation We need to add be before adjectives when we use them as imperatives. Be quiet, girls. Don’t be late again. ·We use the base form of a verb in a (positive/ negative) imperative. ·In a (positive/ negative) imperative, we use don’t before the base form of the verb. Work out the rule √ √ Activity Choose the correct answers: 1.______ play with fire. _______ with fire is dangerous. A. Don't; Playing B. Not; Playing C. Don't; Play D. Not to; To play 2. Life is like a journey.__________ahead, and you will see a lot more beautiful sceneries(风景)． A.Plan B.To plan C.Planning D.Plans Let's do Look at the picture. What will the teacher say? Make sentences with the words from the box on page 95. Some of them must begin with Don’t. Let's do 1. Bill is eating in class. 2. Rose left the door open on a windy day. 3. Jane is answering a question in a low voice. bring close eat sleep speak louder turn to Close the door, Rose. Speak louder, Jane. Don’t eat in class, Bill. Let's do 4. James is sleeping at his desk. 5. Steven is looking at page 47. He should look at page 74. 6. Mary brought her pet mouse to school. bring close