人教版英语选修七Unit 3　Under the sea知识点课件33张

课件33张PPT。
Book 7　Unit 3　Under the sea
1.witness vt.当场见到;目击n.目击者;证人;证据
教材原句
①I thought,at the time,that this was just a story but then I 　witnessed????(witness)it with my own eyes many times.
◆同义句转换
②Great changes have taken place in China in the past ten years.
→The past ten years　have witnessed???? the great changes in China.重点单词◆写作微练
③我们的城市见证了四个不同的季节。
　Our city witnesses four different seasons.????
④这次活动已经见证了我们的友谊。(2016天津)
　This activity has witnessed our friendship.????点拨
be (a)witness to sth.是……的目击者;为……提供证据
witness sth.亲眼看见某事
bear/give witness to sth.为……作证;证明
[联想]
英语中常使用拟人修辞手法的句子,主语通常是时间、地点或心爱之物,如车、船等名词,谓语动词常为witness, see, find等。2.urge vt.催促;极力主张;驱策 n.冲动
教材原句
① “Man overboard! Turn the boat around!”　urged????(urge) George, shouting loudly.◆单句填空
②They urged that the library　(should) be kept???? (keep) open during the vacation.
③In this box are some stem cells that are　urgently????(urgent) needed for a
patient. (2016课标全国Ⅰ改编)
④I never felt 　an???? urge to learn any sign language before. (2017课标全国Ⅰ)◆句型转换
⑤We are urged to read as many books in English as possible.
→　It is urged that we (should) read as many books in English as possible????.
(用it作形式主语改写)点拨
(1)urge sb. to do sth.催促某人做某事
urge sb. on鼓励某人
urge that sb. (should) do sth.呼吁某人做……
urge sth.竭力主张某事
(2)have an urge to do sth.渴望做某事
(3)urgent adj.紧迫的,紧急的
(4)urgently adv.迫切地;紧急地
(5)urgency n.紧急;紧急的事[联想]
“渴望做某事”的其他表达:
be eager to do sth.,be anxious to do sth.,long to do sth.,desire to do sth.,be dying to do sth.,dream of doing sth.3.abandon vt.抛弃;放弃;中止n.放任;放纵
教材原句
①From James's face, I could see he was terrified of 　being abandoned????(abandon) by us.
◆语法填空
Unluckily, Tom ②　was abandoned????(abandon) by his cruel parents. Eventually the ③　abandoned????(abandon)boy felt hopeless, abandoning himself to ④　playing????(play) computer games every day.◆同义句转换
⑤He abandoned himself to reading novels and failed the exam.
→　Abandoning himself to reading novels????, he failed the exam.(用现在分词短语作状语)
◆单句改错
⑥Wang collected more than 7 million abandoning bricks of different ages. (2018课标全国Ⅲ)　abandoning→abandoned????点拨
(1)abandon one's hope/plan/idea放弃某人的希望/计划/主意
abandon oneself to...沉湎于……;陷入……
(2)abandoned adj.被抛弃的;无约束的;放荡的
(3)with abandon放纵地;尽情地4.reflect vi.思考 vt.映射;反射;思考
教材原句
①I'm sitting in the warm night air with a cold drink in my hand and reflect-ing 　on???? the day—a day of pure magic!
◆单句填空
②In these cultures, silence is a call for　reflection????(reflect). (2016课标全国Ⅰ)
③All riders are equipped with 　reflective????(reflect) vests and safety lights.
(2018课标全国Ⅰ)
◆写作微练
④有人主张我们应该经常反思我们对地球的所作所为。(2016北京书面表达)
Someone urges that we 　should often reflect on what we have done???? to the earth.点拨
(1)reflect sth. in (在……中)反射某物
reflect on/upon sth.认真思考某事
reflect that...表达(意见)
(2)reflection n.反射;反映;映像
be a reflection on sb./sth.是某人/物的反映
on/upon reflection仔细考虑后, 经过思考
(3)reflective adj.反射热的,反光的;深思的,沉思的5.aware adj.意识到的,知道的;察觉到的
教材原句
①The first thing I became aware 　of????was all the vivid colours surround-ing me...◆单句填空
②UNESCO recently set April 30 as a day to raise 　awareness????(aware) of jazz music, its significance, and its potential as a unifying(联合)voice across cultures. (2017课标全国Ⅰ)
③Everybody can buy takeaway food, but sometimes we're not aware
????how???? cheaply we can make this food ourselves. (2018课标全国Ⅰ)◆一句多译
通过这项活动,你会意识到保护中国传统文化的重要性。
Through this activity,
?点拨
(1)be/become aware of知道,意识到
be aware that...明白……;意识到……
make sb. aware of使某人意识到
so/as far as I am aware就我所知
(2)awareness n.认识,意识
help (...) out 帮助(某人)摆脱困境或危难
教材原句
①What evidence was there that Old Tom was helping the whalers 　out?????
有什么证据证明老汤姆正在帮助捕鲸者摆脱困境?重点短语◆语法填空
Tom is my good friend, who is always helping me ②　out????whenever I am in trouble. In the last three months, he has been helping me ③　(to)learn???
(learn) English. ④　With????his help, my English has become much better. All in all, he is a ⑤　helpful????(help) boy.◆写作微练
⑥每次我遇到麻烦,他都会帮我摆脱困境。
　Every time I am in trouble, he will help me out.????
⑦如果方便的话,你能帮我修改一下申请书吗?
　If it is convenient, would you please help me (to) correct the application?????
◆单句改错
⑧I was so busy that I couldn't help solving the problem.
　solving→(to)solve????点拨
(1)help sb. with/(to) do sth.帮助某人某事/做某事
can't help doing sth.忍不住做某事
can't help (to) do sth. 不能帮忙做某事
can't help but do sth.忍不住做某事
(2)with the help of sb.=with sb.'s help 在某人的帮助下
without/but for one's help 要不是某人的帮助
(3)helpful adj.乐于助人的1.when引导定语从句
教材原句
①It was a time 　when???? the killer whales, or“killers”as they were then called, helped the whalers catch the baleen whales that were on their annu-al migration.重点句型◆单句填空
②It is a long time　since????I graduated from college.
③It will be two years 　before???? we can see each other again.
④It was two days later　that????I received his gift for my birthday.
⑤Some language experts believe that 10,000 years ago, 　when???? the world had just five to ten million people, they spoke perhaps 12,000 lan-guages between them. (2018课标全国Ⅰ)◆写作微练
⑥曾经一度我缺乏自信心,这让父母很担心。
　There was a time when I lacked confidence, which made my parents very worried.????
⑦不久这儿将举行一个摄影展。(2016课标全国Ⅱ)
　It won't be long before a photography show is held here.????◆单句改错
⑧Never will I forget the time which you helped me get through the terrible days.　which→when????点拨
(1)It/This/That/There was a time when...曾经一度(那时)……, when引导定语从句。
(2)There are times when...有……时候
[联想]
①It be+时间点+when从句, 表示“某个时间发生了某事”。②It be+时间段+since从句, 表示“从某事发生以来有多久了”。
③It+would be/will be+时间段+before从句, 表示“还有多久某事会发生”。
④It is/was+时间状语+that...是强调句型, 对时间状语进行强调。2.where引导地点状语从句
教材原句
①The water was quite shallow but 　where????the reef ended, there was a steep drop to the sandy ocean floor.◆完成句子
②They will go　where they are happy???? (他们快乐的地方).
③Make a mark 　where you have any questions????(在你有疑问的地方).
④　Where there is life????(有生命的地方), there is hope. ◆写作微练
⑤正如谚语所说的,“有志者事竟成”。
　Just as the saying goes, “Where there is a will, there is a way.”????
◆单句改错
⑥I joined an English club last month there I made many new friends.
????there→where????点拨
where..., there be...意为“在……的地方有……”, where引导地点状语
从句。
[联想]
wherever“在任何地方;无论何处”, 也可引导地点状语从句。