3.情态动词的用法-2025-2026学年英语期末语法复习八年级上册（沪教版）

期末语法复习 8上·沪教上海版·情态动词must/can/should的用法 一、情态动词must/can/should的核心用法详解 核心语法：must/can/should 、一、核心考点解析·考点1 考点：情态动词mst表示“必须”的基本用法 规则：must表示说话人认为“必须”做某事，语气强烈，否定形式为mustn't（禁止)。 真题再现（沪教上海版8上期末真题改编）： You follow the traffic rules when crossing the road. A)must B)can C)should D)may 答案：A 解析：遵守交通规则是法律强制要求，必须用must。 例题练习： We run in the hallway.It's dangerous. 答案：musin't 解析：走廊奔跑被明确禁止，用mustn't表示禁止。 二、核心考点解析·考点2 考点：情态动词can表示“能力”或“许可”的用法 规则：can表示“能；会”（能力）或“可以”（许可），否定形式为can't(不能/不可以)。 真题再现： -you speak English?-Yes,I can A)Must B)Can C)Should D)Need 答案：B 解析：询问语言能力用can。 例题练习 Students_use mobile phones in class. 答案：cant 解析：课堂禁止使用手机，用cam't表示不允许。 三、核心考点解析·考点3 考点：情态动词should表示“应该”的建议用法 规则：should表示说话人提出的“建议”或“劝告”，语气较委婉，否定形式为houldn't (不应该)。 真题再现： You_eat more vegetables to keep healthy. A)must B)can C)should D)will 答案：C 解析：多吃蔬菜是健康建议，用should表示劝告。 例题练习： He be late for school again.The teacher will be angry. 答案：shouldn't 解析：再次迟到会惹老师生气，用shouldn't表示不应该。 四、核心考点解析·考点4 考点：must/can/should的一般疑问句及回答 规则：must引导的疑问句肯定回答用must,否定回答用needn't或don't have to;can引 导的疑问句回答用ca/can't:should引导的疑问句回答用should/shouldn't。 真题再现： -Must I finish my homework now?-No,you_.You can do it after dinner. A)mustn't B)needn't C)can't D)shouldn't 答案：B 解析：must的否定回答用needn't表示不必。 例题练习： Can he play the piano?(作否定回答)一，he一 答案：No,cant 解析：can的否定回答用No,.cant。 二、考点综合训练 (一)单项选择 1.Youwear a seat belt when driving a car.It's the law A)must B)can C)should D)may 2.-I borrow your dictionary for a minute?-Sure,here you are. A)Must B)Can C)Should D)Need 3.We throw rubbish in the park.It's not allowed. A)mustn't B)can't C)shouldn't D)needn't 4.You take an umbrella today.The weather forecast says it will rain. A)must B)can C)should D)will 5.-Must we finish the project by Friday?-No,you.You can hand it in next Monday. A)mustn't B)needn't C)can't D)shouldn't 6.-your brother swim?-Yes,he can.He swims very well A)Must B)Can C)Should D)Need 7.Students be quiet in the library.Other people are reading A)must B)can C)should D)may 8.Youeat too much candy.It's bad for your teeth. A)mustn't B)can't C)shouldn't D)needn't (二)语法填空 1.We(must)run red lights.It's dangerous. 2.-Can you play basketball?-No,I_.(can) 3.You(should)help your parents with housework.It's a good habit. 4.-Must I return the book today?-No,you_(need) 5.She_(can)speak three languages:English,French and Chinese. 6.We(must)keep our classroom clean every day (三)句型转换 1.You must finish your homework first..（改为一般疑问句并作否定回答) 一I finish my homework first?—No,you_ 2.They can play the guitar.（改为否定句) They the guitar. 3.We should wear warm clothes in winter..(改为一般疑问句并作肯定回答) -we wear warm clothes in winter?-Yes,you_. (四)篇章填空 It's Sunday today.Tom and his family are planning a trip.Tom's mother says,"We1 (must)leave early to avoid traffic jams."Tom asks,"2 (can)we take the bus?"His father answers,"No,we_3(can).The bus is too slow.We will drive the car." Tom's little sister wants to bring her pet dog,but their mother says,"You4(mustn't) take the dog.The park doesn't allow pets."Tom says,"We5(should)bring some snacks and water.We6(can)have a picnic there."Everyone agrees.Before leaving,Tom's father checks the car and says,"We7(must)make sure the car is safe. (五)参考答案与解析 1.单项选择答案：1.A2.B3.A4.C5.B6.B7.A8.C 2.语法填空答案： 1.mustn't 2.can't 3.should 4.needn't 5.can 6.must 3.句型转换答案： 1.Must;needn't 2.can't play 3.Should;should 4.篇章填空答案： 1.must 2.Can 3.can't 4.mustn't 5.should 6.can 7.must 英语语法复习手册·8上·沪教上海版·情态动词must/can/should的用法