Unit 2 4.第三课时（作业课件）-【优翼·学练优】2024-2025学年七年级英语下册同步备课（人教版2024）

优超 优型 学练优七年级英语下(RJ) 优 第三课时 Grammar Focus(3a~3d) 语法精讲 祈使句 Do型，即以行为动词的 开头。如：Come here. 肯定结构 Be型，即以be动词开头。如：Be quiet! Let型，即以动词let开头。如：Let me do it,. +动词原形+其他.如：Don't be late for school.. Don'tlet+宾语+动词原形(+其他).Let+宾语+not+动词原形(+其他).如：Don'tlet her go./Let her not go. 祈使句 否定 No+ 结构 /动名词如：No photos./No parking, 用never代替don't来加强语气。如：Never give up! 为表达委婉的语气，可在句首或句尾加上please。please?在句尾时要用逗号与句子其他部分隔开。 如：Please sit down.=Sit down,please.. 注意 祈使句中的动词（词组）有时也可以省略。如：Come this way, please.=This way,please. 优 情态动词 can表示请求、允许，意为“可以”。如：Can I bring the new watch to school? 表示拒绝对方的请求或不同意、不允许，意为“不可以”。 can 如：一Can I wateh TV？-No,you can'. 强调说话者的主观意愿，意为“必须”。如：I must go home now because it'slate. 情态动词 注意：由must引出的一般疑问句，肯定回答常用must,否定回答常用needn't/don'thave to。. 常用于一般现在时，无人称和数的变化。如：I/He/You/They must work hard. must 意为“不准；禁止”。如：You mustn't swim in the river. 强调客观需要，意为“不得不”。如：I'stoo late.I have to take a taxi. 可以用于不同的时态，有人称和数的变化。如：She has to wear a uniform at school.. have to don't have to表示“不必”。如：You don't have to get up early on weekends. 优@ 语法精练 I.根据句意用括号内所给单词的适当形式填空。 1.(be)on time for school,please. 2. (not run)in the school hallways. 3. (remember)to bring your book. 4.Let's (play)football after school. 优 5.No litter)!It's our duty to keep our classroom clean. 6.The library closes at 9:30 p.m.and everyone (have)to leave by then. Ⅱ.按要求完成句子，每空一词。 1.Open the door.（改为否定句) the door. 2.不要让他在河里游泳！（根据汉语意思完成 句子) Let him in the river! 3.请穿校服上学。（根据汉语意思完成句子) the school uniform to school. 优 4.保罗有时候周末得上班。（根据汉语意思完成 句子) Paul sometimes work at weekends. 5.Must I do my homework now?（作否定回答) you Ⅲ. 微语篇练语法)用can/must/have to的适 当形式填空。 Dear Mr Brown, I'm a 12-year-old girl.There are too many rules in my family.I 1. get up at a quarter past six.Mum says that I 2. have breakfast at home.After school,I 3. play with my friends because I need to finish my homework first. On Friday nights,I 4. play the violin for one hour.I 5. clean my room and learn to play chess on Saturdays.I don't like these rules at all.What can I do?I need your help. Li Hua