新外研版初中英语八下Unit5 语法专项 宾语从句课件

这是一份新外研版初中英语八下Unit5 语法专项 宾语从句课件，共30页。
教学课件外研英语八年级下册 Unit 5语法专项—— 宾语从句（that/if/whether引导） 全解精讲+分层练习学习目标理解宾语从句的定义及在复合句中的作用掌握that/if/whether引导宾语从句的核心用法牢记宾语从句的陈述语序核心规则区分if和whether的通用与特殊使用场景能在语境中正确选用引导词并完成句式转换宾语从句的基础定义复合句中，充当主句宾语的句子叫宾语从句宾语从句替代名词/代词，作主句谓语的宾语基本结构：主句 + 引导词 + 宾语从句本单元重点学习that/if/whether三类引导词核心用途：表达事实、观点或不确定的疑问核心引导词用法对比（一）核心引导词用法对比（二）that引导的宾语从句·核心用法用于表达确定的事实/观点，无疑问含义that无实义，不充当从句任何成分口语/非正式书面语中可直接省略that正式文体中，保留that更符合语法规范从句始终遵循主语+谓语的陈述语序that引导的宾语从句·例句We know (that) the Sahara is the largest desert.People believed (that) dinosaurs lived for millions of years.The teacher said (that) the Amazon has millions of species.I learn (that) the polar ice is melting little by little.括号内that可省略，句意保持不变if/whether引导的宾语从句·核心用法二者均表“是否”，用于疑问/不确定的语境有实际含义，不可省略，是主从句的连接关键从句必须用陈述语序，不可用疑问语序主句多为表达疑问、探究的谓语动词多数普通语境中，if和whether可互换使用if/whether引导的宾语从句·通用例句Scientists aren't sure if there is life on Mars.We want to know whether the plant can live in the desert.She asked if we would visit the nature museum.I wonder whether the old tree is over 1000 years old.以上例句中if/whether可直接互换if/whether的特殊用法·只能用whether与or not直接连用时，只能用whether位于介词后面时，只能用whether后接不定式（to do）时，只能用whether本单元重点考点：or not连用的情况这三类场景是if和whether的核心区分点只能用whether的例句（一）We're not sure whether or not the bird can fly far.I don't know whether or not he will join the exploration team.She wonders whether or not the river is over 100 meters wide.whether or not 不可替换为if or not只能用whether的例句（二）It depends on whether we can get enough water.I'm thinking about whether to go on the field trip.They are talking about whether the plan will work.介词后/不定式前，均不可用if替代whether宾语从句的核心规则·陈述语序无论主句是陈述句还是疑问句宾语从句都必须使用主语+谓语的陈述语序不可使用疑问语序（助动词/系动词提前）这是宾语从句的必考规则，需严格遵守判断语序是否正确是解题的关键步骤宾语从句语序·错误与正确对比错误：He asked if where had I been.正确：He asked where I had been.错误：Do you know if is it a new animal?正确：Do you know if it is a new animal?错误：I wonder whether can we find the forest.正确：I wonder whether we can find the forest.语序规则·实战小技巧看到宾语从句，先找从句的主语和谓语确保主语在前，谓语（动词/系动词）在后遇到特殊疑问词，保留疑问词放从句句首疑问词后直接接主语+谓语，无需调整做题时先判断语序，再选择引导词that引导的宾语从句·拓展注意当主句谓语是think/say/tell等动词，且从句是多个并列句时，第一个that可省，后续that不可省例：He said (that) he liked nature and that he would go hiking.正式书面语中，为保证句子严谨，建议全程保留thatif/whether使用·易混点提醒if 既可以引导宾语从句表“是否”，也可以引导条件状语从句表“如果”做题时需结合语境判断if的含义例：I don't know if it will rain tomorrow.（是否，宾语从句）例：If it rains tomorrow, we won't go out.（如果，条件状语从句）宾语从句·语境解题思路第一步：判断主句表达的是确定事实还是疑问第二步：确定事实用that，表疑问用if/whether第三步：检查是否有只能用whether的特殊场景第四步：验证从句是否为陈述语序第五步：确认引导词使用符合语法规则练习一：用that/if/whether填空 1.People think ________ the panda is the cutest animal in the world.2.I don't know ___________ the lake is deep enough for swimming.3.The teacher told us ________ the Amazon is in South America.4.They wonder ____________ they can see the northern lights tonight.5.We believe ________ wild animals need our protection.that if/whetherthat if/whetherthat练习二：用that/if/whether填空 1.I'm not sure ___________ or not we can finish the exploration on time.2.The report shows ____________ the number of pandas is increasing.3.She asked me _____________ I had ever been to a nature reserve.4.It's up to you ___________ we go by bus or by bike.5.We all know ___________ the earth is round and it goes around the sun.whetherthatif/whetherwhether that练习三：句型转换（直接引语变间接引语）1."The tiger is a protected animal," he said.He said ________ the tiger is a protected animal.2."Will you go to the zoo with me?" she asked me. She asked me _____________ I would go to the zoo with her.3."The forest has many rare plants," the guide told us. The guide told us ___________ the forest has many rare plants.that if/whetherthat练习四：句型转换（合并句子）1.Is the red panda only found in China? We want to know.We want to know ___________ the red panda is only found in China.2.Oceans cover most of the earth's surface. We learned it. We learned ________ oceans cover most of the earth's surface.3.Will the snow melt completely in spring? We're not sure.We're not sure _____________ the snow will melt completely in spring.if/whetherthatif/whether练习五：单项选择 1.I know _______ the Great Wall is one of the world's wonders.A. that B. if C. whether D. where2.She wonders _______ the flowers will bloom in March.A. that B. if C. what D. who3.The book says _______ the desert is getting smaller every year.A. that B. if C. whether D. howABA练习六：单项选择 1.I'm not sure _______ I should take a camera or not on the trip.A. that B. if C. whether D. which2.They talked about _______ they would set up a tent in the forest.A. that B. if C. whether D. when3.He wondered _______ the river is clean enough to drink.A. that B. if C. both A and B D. both B and CCCD练习七：单句改错1.I don't know if or not he will come to the party.2.She asked that where I found the beautiful stone.3.Do you know if is the nature park open on Monday?4.We believe that the earth is flat and the sun goes around it.5.It depends on if we can get help from the local people.if→whether 删thatis it→it is flat→round if→whether练习八：情景对话补全1.A: Do you think ___________ the fox lives in this forest?B: Yes, I heard _______ someone saw a fox here yesterday.2.A: I'm not sure ____________ we can cross the river safely.B: Let's ask the farmer ____________ he has a boat for us.3.A: The scientist said ____________ the plant can cure some illnesses.B: I didn't know ____________ it has such an important use.if/whetherthatif/whetherif/whetherthatthat宾语从句·高频错题总结1.混淆if的两种含义，误判从句类型2.忽略or not连用，错用if代替whether3.宾语从句使用疑问语序，主谓颠倒4.正式文体中随意省略that，导致句子不严谨5.介词后错用if，未替换成whether核心知识点·速记口诀宾语从句三要素，引导语序要记住陈述事实用that，可省可留看文体表是否用if/whether，互换有例外or not介后不定式，只选whether别出错不管主句啥句式，从句陈述别颠倒课堂小结宾语从句是充当主句宾语的句子，基本结构为主句+引导词+从句that表陈述可省略，if/whether表是否有特殊使用规则陈述语序是宾语从句的核心规则，任何情况不可违反解题先判语境和语序，再选引导词，关注whether的特殊场景结合主题多造句、多练习，熟练运用核心知识点教学课件 Unit 5语法专项—— 宾语从句（that/if/whether引导）Thank you for listening!