Unit8 Grammar focus -3c课件2023-2024学年人教版英语八年级上册

1 Role-play the conversation with your partner. How do you make a banana milk shake? First, peel … Then, … Next, cut up … After that, … Finally, … 1. First, _______ (剥皮；去皮) the bananas. 2. Next, ______ (把……放入) the bananas in the blender. 3. Then, _____ the milk _____(把……倒入) the blender. 4. Finally, _____ _____(打开) the blender. peel put pour into turn on How do you make a banana milk shake? 3 How do you make a banana milk shake? First, peel the bananas. Next, put the bananas in the blender. Then, pour the milk into the blender. Finally, turn on the blender. Pay attention to the words in black. 表示顺序的副词，可用来表达制作步骤的先后顺序。 4 用以表示请求、命令、许可、劝告、建议、禁止等的句子叫做祈使句。 特点： 通常以动词原形或Don’t +动词原形开头, 没有时态和数的变化； 暗含的主语是you, 但通常省略。 5 1. 以实义动词原形开头。 e.g. Come here. Look at the map. 2. 以动词be开头。 e.g. Be a good boy. Be quiet, please. 3. 以Let开头。 e.g. Let me have a look. Let’s go! 【注意】 有时可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。如果在句尾加please，应该用逗号与前句隔开。 e.g. Come in, please. 6 1. 在动词原形前加don’t。 e.g. Don’t sit here. Don’t be late. 2. 以let开头的祈使句, 其否定式有两种：一种是直接在句首加don’t; 另一种是“let +宾语+ not +动词原形+ (其他)”。 e.g. Don’t let him go. Let Jim not play there. 【注意】 “No + 名词 / 动词-ing形式”表示禁止或规劝，常用于公共场所。 e.g. No photos! No smoking！   7 祈使句的回答 祈使句通常表示将要发生的动作，所以回答时一般用will或won’t。回答肯定形式的祈使句用will，回答否定形式的祈使句用won’t。 — Please remember to bring your homework here tomorrow. — OK, I will. — Don’t be late for school again. — Sorry, I won’t. 8 祈使句的反意疑问句 1. 肯定形式的祈使句的反意疑问部分可用will you/won’t you/would you。 Please keep quiet, will you? Listen to me, won’t you? Let me help you, would you? 2. 否定形式的祈使句后只能跟will you。 Don’t tell it to anyone else, will you? 3. Let’s开头的用shall we，let us开头的用will you。 Let’s go for a walk after supper, shall we? Let us go for a walk after supper, will you? 表示邀请或表示请求。 9 1. —Sam, ______ run in the hallways. It's very dangerous. —Sorry, Ms. Black. A. do B. don't C. not D. doesn’t (2022四川遂宁中考) 2. — __