Unit 4 Space exploration Discovering Useful Structures （ppt课件）-2022新人教版（2019）《高中英语》必修第三册.pptx

1、Unit 4 Space explorationSection B Discovering Useful StructuresCONTENTSLeading-inWhile-classAfter-classPart 1Part 1Part 2Part 2Part 3Part 3Part.1Leading-inRewrite the sentences using infinitives or“in order to/so as to”.Change the italicised parts accordingly.Learn from the examples.1.In 2003 Yuri M

2、alenchenko became the first person who got married in space.the first person to get married in space.2.In space,astronauts collect all dirty water so that it can be recycled for later use.collect all dirty water so as to recycle it for later use.3.Mankind has always been curious about the universe a

3、nd many people have dreamt that one day they would fly into space.4.Astronauts bones and muscles can get very weak in space due to the lack of gravity,so they need to exercise every day,which will help them stay healthy.many people have the dream to fly into space one day.so they need to exercise ev

4、ery day to/in order to/so as to stay healthy.5.Astronauts have to use tape to stick everything down while working in space because everything would float off otherwise.stick everything down while working in space to/in order to/so as to keep everything from floating off.6.During a spacewalk,astronau

5、ts have to move slowly so that they can keep their bodies under control.move slowly to/in order to/so as to keep their bodies under control.Part.2While-class1、in order to in order to后加动词原形，在句中作目的状语，可放在句首或句尾 in order to do sth的否定形式是 in order not to do sth.in order that/so that引导目的状语从句，从句中常有情态动词can、co

6、uld、may、might等，当主句和从句的主语一致时，in order that/so that可以和 in order to或表目的的不定式直接转换。例：Its embarrassing the extremes hell go to in order to impress his boss.他为了给上司留下深刻印象，不惜走极端，真令人难堪。2、lack n.缺乏；短缺 vt.没有；缺乏lack sth.缺乏某物lack（for）nothing 没有欠缺a lack of 缺乏no lack of 不缺乏be lacking in缺乏例：There is a lack of knowled

7、ge about the tax system.大家对税制缺乏了解。3、figure n.数字；人物；图形；体形；雕像have a good figure有一个好身材keep ones figure保持身材v.计算；认为；出现figure out计算；理解，弄清楚figure that.认为例：I cant figure out why he did so.我搞不懂他为什么这么做。4、such as 例如；像这样例：I like drinks,such as tea and coffee.我喜欢饮料，例如茶和咖啡。动词不定式作定语和状语动词不定式作定语和状语一、动词不定式作状语动词不定式作状语

8、通常表目的、结果、原因等。a.表目的They ran over to welcome the delegates.他们跑过去欢迎代表们。He stood up to be seen better.他站起来以让别人看得更清楚。b.表结果What have I said to make you so angry？我说了什么让你这么生气？He came round to find himself in hospital.他苏醒过来发现自己住院了。c.表原因不定式表示原因时般放在句子的末尾，说明主语产生某种情感（glad pleased、sad、worried、sad excited）的原因。如：Im

9、 very glad to hear that Li Lei has been elected secretary of the Party.听说李蕾被选为了党委书记，我很高兴。d.作评论性状语有些不定式用于修饰整个句子，表明说话者的观点或态度，我们称之为评论性状语。To be honest，I dont like her.说实话，我不喜欢她。二、动词不定式作定语动词不定式作定语常用来修饰名词或不定代词，放在所修饰的词的后面。作后置定语。如：Who was the first one to arrive？谁第一个到的？The best way to learn English is to us

10、e it.学英语最好的方法是使用它。When is the best time to plant vegetables？什么时候是种植蔬菜的最好时间？动词不定式作定语，它与所修饰的名词或代词可能是主动关系，也可能是被动关系。如果是被动关系，且句中含有不定式动作的执行者时，不定式要用主动表示被动。He was the last one to leave school yesterday.他是昨天最后一个离开学校的人。动词不定式（短语）作定语修饰名词且与其所修饰的词之间为被动关系时，如果不定式中的动词为不及物动词，那么其后应加上一个含义上所需要的介词。如：I have no chair to si

11、t on.我没有椅子坐。He has no house to live in，他没有房子住。Part.3After-class1_(make)our school life more colorful,we will organize a variety of extra-curricular activities.(所给词的适当形式填空)2The hotel makes every effort _(make)the guests feel at home.(所给词的适当形式填空)1To make【详解】考查非谓语动词。句意：为了使我们的学校生活更加丰富多彩，我们将组织各种课外活动。分析句子

12、结构可知，句中已有谓语动词，空处为非谓语动词作目的状语，所以用动词不定式。故填To make。2to make【详解】考查非谓语动词。句意：旅馆尽一切努力使客人有宾至如归的感觉。分析句子结构可知，句子中已经有谓语动词，因此需要填入非谓语动词；此处表示目的，因此用动词不定式。故填to make。1To make【详解】考查非谓语动词。句意：为了使我们的学校生活更加丰富多彩，我们将组织各种课外活动。分析句子结构可知，句中已有谓语动词，空处为非谓语动词作目的状语，所以用动词不定式。故填To make。2to make【详解】考查非谓语动词。句意：旅馆尽一切努力使客人有宾至如归的感觉。分析句子结构可知

13、，句子中已经有谓语动词，因此需要填入非谓语动词；此处表示目的，因此用动词不定式。故填to make。3I thanked my secretary for reminding me_(pick)my father up at the airport.I had completely forgotten about his arrival!(所给词的适当形式填空)4Jason is saving a sum of money _(buy)a new house for his family.3to pick【详解】考查非谓语动词。句意：我感谢秘书提醒我去机场接我父亲。我完全忘了他来了！固定搭配remind sb.to do sth.“提醒某人做某事”。故填to pick。4to buy【详解】考查非谓语动词。句意：Jason正在存钱给家人买一栋新房。分析句子结构可知，句中存在be动词is作谓语，所以空处需用非谓语动词；结合句意可知，空处需用动词不定式作目的状语。故填to buy。Thank you！