Unit 4 语法知识点汇总（祈使句 + should & had better 提建议）2026-2027学年译林版八年级英语上册

该初中英语单元复习讲义通过模块化知识框架系统梳理了祈使句与should/had better提建议的语法体系，将祈使句的含义、结构（肯定/否定形式、please用法、Let’s句型）与提建议句型的核心规则（动词原形、否定形式、语气对比）分层呈现，清晰展现知识点内在逻辑与重难点分布。 讲义亮点在于“基础巩固-应用提升”的分层练习设计，如单项选择考查祈使句否定形式（Don’t +动词原形）、句型转换要求将should句型改写为had better同义句，培养学生语言运用与逻辑思维能力。配套解析标注核心规则（如had better not后不加to），基础薄弱学生可夯实语法基础，优秀学生能深化规则应用，为教师实施精准复习教学提供有效支持。

Unit 4 语法知识点汇总（祈使句 + should & had better 提建议） 一、祈使句 （一）含义 向他人发出命令、提出要求或者建议，祈使句通常不写出主语（主语默认为you）。 例句： Be quiet, please! 请保持安静！ Don’t be late again! 不要再迟到了！ （二）基本结构 1. 肯定形式：动词原形开头 例：Please pass me the ball. 请把球传给我。 2. 否定形式：Don’t + 动词原形 （三）please 的用法 用来使语气更加礼貌客气。 1. please 放在句首：无需逗号 Please open the door. 2. please 放在句末：前面加逗号 Open the door, please. （四）Let’s … 句型 含义：咱们……（向对方提出建议） 结构：Let’s + 动词原形 例句：Let’s visit Nanjing Museum first! 让我们先参观南京博物院吧！ 二、用 should 和 had better 提建议 （一）基础含义 should 意为“应该”；had better 意为“最好”； 📌语气对比：had better > should 例句： You had better water the flowers as soon as possible. 你最好尽快给花浇水。 All of us should take part in this activity. 我们每个人都应该参加这项活动。 （二）核心规则 should 和 had better 后面都接动词原形，无人称、数的变化。 （三）缩写形式 had better 常缩写为 ’d better 例：We’d better leave before it rains. 我们最好在下雨前离开。 （四）否定形式 1. should → should not = shouldn’t + 动词原形 例：He shouldn’t be late for school again. 他不该再上学迟到了。 2. had better → had better not + 动词原形（⚠️不可以加to） 例：You had better not play the piano now. 现在你最好别弹钢琴。 配套练习题 一、单项选择 1. ______ careful! There is lots of traffic. A. Be B. Is C. Are D. Being 2. You ______ walk alone at night. It’s dangerous. A. should B. shouldn’t C. can D. need 3. ______ wake me up early tomorrow, Mum. A. Not B. Don’t C. No D. Doesn’t 4. We’d better ______ late for the meeting. A. not be B. not to be C. don’t be D. won’t be 5. Let’s ______ basketball after school. A. play B. to play C. playing D. plays 6. You ______ read more books. It’s good for you. A. shouldn’t B. should C. would D. had better not 7. ______ talk loudly in the library, please. A. Don’t B. Not C. No D. Doesn’t 8. She’d better ______ too much junk food. A. not eat B. not to eat C. don’t eat D. doesn’t eat 9. Please ______ your homework before dinner. A. finish B. to finish C. finishing D. finishes 10. —I feel tired. —You ______ have a good rest. A. had better not B. shouldn’t C. should D. don’t 二、用括号内动词适当形式填空 1. ______ (not run) in the street. It’s unsafe. 2. You should ______ (practise) English every day. 3. We’d better ______ (leave) now. 4. Let’s ______ (go) boating this weekend. 5. You had better not ______ (stay) up late. 三、句型转换 1. Close the window, please.（改为否定句） ______ ______ the window, please. 2. You should finish your homework first.（改为否定句） You ______ ______ your homework first. 3. We should go there by bus.（同义句改写，使用had better） We ______ ______ go there by bus. 参考答案与解析 一、单项选择 1. A 解析：祈使句动词原形开头，Be careful 小心 2. B 解析：夜晚独自走很危险，不应该这样做 3. B 解析：否定祈使句 Don’t + 动词原形 4. A 解析：had better not + 动词原形 5. A 解析：Let’s + 动词原形 6. B 解析：多读书有益，应该多读书 7. A 解析：否定祈使句 Don’t talk loudly 8. A 解析：had better not do sth. 最好不要做某事 9. A 解析：please后接动词原形 10. C 解析：感到疲惫，建议好好休息，should 应该 二、适当形式填空 1. Don’t run 2. practise 3. leave 4. go 5. stay 三、句型转换 1. Don’t close 2. shouldn’t finish 3. had better 学科网（北京）股份有限公司 $