英语八年级下册（2024））Understanding ideas优秀ppt课件

这是一份英语八年级下册（2024））Understanding ideas优秀ppt课件，共25页。PPT课件主要包含了宾语从句，that，Example等内容，欢迎下载使用。
能在语篇中识别宾语从句，掌握 that/if/whether 的基本用法与区别。；
能在写作中正确运用宾语从句，表达观点与探究思考。
能正确使用引导词，完成句型填空与造句，使用陈述语序；
Review the stry.
Let’s retell.
abut the dinsaur
abut the flwer
abut the ants
a windw n the past
a key t unlck mre secrets f nature
1. secrets2. Thanks t3. (always) changed4. 35 millin / thirty-five millin5. unknwn6. ant7. windw8. nature
宾语从句：放在动词后面作宾语的句子
Read and find.
Hwever, thanks t a piece f amber, scientists nw knw that this idea is wrng.
They als help us understand that life n earth has always changed.
But the find prves that it did 35 millin years ag.
In the future, amber may als help us discver if ther species have changed ver time.
Research shws that they are a cmpletely new species.
Scientists used t believe that ants came frm the nrthern half f the earth.
Wh knws whether this piece f amber will tell us mre secrets?
表示肯定或陈述内容时，用that引导宾语从句。表示“是否”这种不确定的概念时，用if或whether引导宾语从句。
Object clauser 宾语从句
一、什么是宾语从句？（定义）我们先回忆一个基础句子结构：主语 + 谓语 + 宾语比如：I buy a bk.I 是主语，buy 是谓语动词，a bk 是宾语（用一个短语当宾语）。但如果我们想表达更复杂的意思，比如：我知道 你昨天去看电影了这里 “你昨天去看电影了” 是一个完整的句子，没法用一个单词 / 短语表达，所以我们把这个完整句子放在动词（knw）后面当宾语，这个当宾语的完整句子，就叫宾语从句。
三、用法 1：that 引导的宾语从句1. 什么时候用 that？当主句的动词表达肯定、确定的想法时，比如 “希望、相信、知道、认为、说” 这类动词，后面的从句就用 that 引导。✅ 常见动词：hpe, believe, think, knw, say, feel, hear, see, tell 等
二、宾语从句分几类？一共 3 种引导词，本单元先学前两种：that 引导的宾语从句whether / if 引导的宾语从句疑问词（what/when/where 等）引导的宾语从句（后续单元学）
2. that 有什么特点？that 没有实际意思，只是一个 “连接词”，告诉大家后面的句子是前面动词的宾语。绝大多数情况下，that 可以省略，不影响句子意思。3. 例句（带翻译）I hpe (that) it will snw this winter.我希望今年冬天会下雪。I believe (that) we shall becme gd friends.我相信我们会成为好朋友。Betty thinks (that) trees can imprve the air quality.Betty 认为树木可以改善空气质量。
四、用法 2：whether /if 引导的宾语从句1. 什么时候用 whether/if？当主句表达不确定、疑问的想法时，比如 “不知道、不清楚、想知道、问” 这类动词，后面的从句要用 whether 或 if 引导，表达 “是否” 的意思，不能用 that。2. whether 和 if 怎么选？没有 r nt 时，两个词都能用：He asks whether / if we will g fishing n Sunday.他问我们星期天是否会去钓鱼。有 r nt 时，只能用 whether，固定搭配 nt：He des nt knw whether they will plant trees n Saturday r nt.
Cnnect the sentences with that, if r whether.
Scientists aren’t sure if / whether there is life in uter space.
Jhn tld his parents that he wanted t be a scientist and study plants.
Emily wants t knw if / whether Mr Brwn is interested in insects r birds.
Scientists aren’t sure
Jhn tld his parents
Mr Brwn is interested in insects r birds.
if / whether
there is life in uter space.
he wanted t be a scientist and study plants.
if / whether
Emily wants t knw
一般疑问句，表示“是否”，用if或whether引导
肯定句，表示肯定或陈述内容，用that引导
Cmplete the messages with that, if r whether.
1. What is Daniel’s questin n the message bard?Daniel saw that the museum missed Plut in the mdel f the slar system. He wants t knw if / whether this is a mistake.2. Why isn’t Plut ne f the planets in the slar system?In 2006, scientists agreed that a true planet: (1) mves arund the sun; (2) is rund (r nearly rund); (3) can clear things in its way. Plut desn’t meet the third pint.3. What can yu learn frm the messages? Peple's understanding f nature keeps changing.4. What discveries f nature d yu knw?
Read and answer.
1. What is Daniel’s questin n the message bard?Daniel saw that the museum missed Plut in the mdel f the slar system. He wants t knw if / whether this is a mistake.2. Why isn’t Plut ne f the planets in the slar system?In 2006, scientists agreed that a true planet: (1) mves arund the sun; (2) is rund (r nearly rund); (3) can clear things in its way. Plut desn’t meet the third pint.
Read the ntice.
Grup wrk. Decide n ne discvery and answer the questins.
1. What is the discvery?2. Wh made the discvery?3. What’s amazing abut it?4. What can yu learn frm it?
1. What is the discvery?Fr hundreds f years, peple believed that...; The discvery f... has changed ld beliefs abut...; By..., ... fund / realised / saw that...; Research shws Wh made the discvery?By..., ... fund / realised / saw that...; ... made an amazing discvery.3. What’s amazing abut it?It’s amazing that...; What’s amazing is that...; It prves that...; Research shws that...; ... unlck the secrets f nature.4. What can yu learn frm it?It teaches us that...; I can learn that...; We shuld put mre effrt int...
1. What is the discvery?Fr hundreds f years, peple believed that...; The discvery f... has changed ld beliefs abut...; By..., ... fund / realised / saw that...; Research shws that...
By watching and listening carefully, scientists have discvered that whales use these sunds t talk t each ther in the cean.
2. Wh made the discvery?By..., ... fund / realised / saw that...; ... made an amazing discvery.
In the 1960s, a scientist named Rger Payne studied humpback whales. He made an amazing discvery. Their sunds were special repetitive patterns, just like human sngs. His research shws that whale sngs can travel very far underwater. Whales use these sngs t share infrmatin, find fd and lk fr friends. Smetimes, many whales sing the same sng, and the sng can change ver time.
3. What’s amazing abut it?It’s amazing that...; What’s amazing is that...; It prves that...; Research shws that...; ... unlck the secrets f nature.
4. What can yu learn frm it?It teaches us that...; I can learn that...; We shuld put mre effrt int...
This discvery teaches us that animals have smart ways t cmmunicate. If we pay attentin, we can learn many wnderful things abut nature.
Write yur passage.
Let’s check in pairs. Then share in class.
Evaluatin criteria:• Intrduce what the discvery is and wh made it.• Describe what is amazing abut it.• Explain what can be learnt frm it.• Use the wrds and expressins frm the reading passage and the Useful expressins.• Use bject clauses crrectly.