Unit 4 Discovering Useful Structures 语法课件PPT -（新教材）高中英语人教版（2019）必修第三册 .pptx

1、Lead-in1.Scientists work hard to find answers.Perception2.They make vehicles to carry brave people into space to find out the secrets of the universe.3.However,some scientists were determined to help humans realise their dream to explore space.4.Yuri Gagarin became the first person in the world to g

2、o into space.5.Americas NASA space agency launched Voyager 1 on 5 September 1977 to study deep space.目的状语目的状语定语定语目的状语6.The disaster made everyone sad and disappointed,but the desire to explore the universe never died.7.China beceme the third country in the world to independently send humans into spa

3、ce in 2003.8.This signalled one step further in Chinas plan to establish a space station in the future.9.More recently,China has sent Change 4 to explore the surface of the far side of the moon to make measurements and observations.定语目的状语定语定语Perception10.Europe,the US,and China all have plans to fur

4、ther study and explore planets like Mars and Jupiter.定语11.Despite the difficulties,scientists hope future discoveries will not only enable us to understand how the universe began,but also help us survive well into the future.目的状语Perceptions1.当修饰的名词是ability,ambition,attempt,chance,courage,desire,deci

5、sion,effort,failure,moment,promise,right,time,wish (一些表示企图、努力、愿望、打算、能力等意义的名词)e.g.1.Please make an effort to catch the bus.2.He made a promise to come here on time tomorrow.（一）动词不定式作定语的情况2.不定式作定语，修饰the first,the last,the third等，中心词为不定时的执行者时用to do（主动），中心词为不定时的承受者时用to be done（被动）。e.g.1.The newspaper re

6、porter was the last to walk out of the cave.2.This is the third question to be discussed.（一）动词不定式作定语的情况3.当定语表示未来还没做的动作时。e.g.1.The letter to be written is to my father.2.The matter to be discussed is important.4.something,anything,nothing,everything 等复合不定代词常用不定式作后置定语。1.Ive grown so crazy about everyt

7、hing to do with nature.（一）动词不定式作定语的情况5.不定式作定语也可用在haveto do和there be句型中。e.g.1.There is no one to take care of her.2.I have no jewelry _(wear).to wear（一）动词不定式作定语的情况1.不定式作目的状语1.To learn a language well,you must make painstaking effort.2.He ran fast on the road in order to catch the first bus.3.He worke

8、d hard until mid-night so as to pass the exam.（二）动词不定式作状语的情况不定式作目的状语可以谓语句首和句末，表强调时，通常用 in order to 或 so as to.1.不定式作原因状语1.We are quite glad to meet you here.2.They were very shocked to be told the good news.（二）动词不定式作状语的情况不定式常跟在一些形容词之后说明产生某种情绪的原因。常见的形容词有lucky,happy,glad,worried,interested等。1.不定式作结果状语

9、1.Im too tired to do well.2.He is old enough to go to school.3.He rushed back,only to find the book missing.4.She is so proud as to look down upon others.（二）动词不定式作状语的情况不定式常作结果状语，多见于tooto;enough to;only to do(表意外的结果的发生)，so/suchas to(如此以至于)结构中。Discuss fuctions and meanings of the italicized infinitive

10、s.P42 Task 1（in order）to fly 不定式作目的状语in order to work 不定式作目的状语to get 不定式作目的状语不定式作dream后置定语不定式作person后置定语Rewrite the sentences using infinitives or in order to/so as to+do.Change the italicized parts accordingly.P42 Task 2Discuss fuctions and meanings of the italicized infinitives.P42 Task 2Complete the passage with the correct forms of the verbs in brackets.P42 Task 3to achieveto achieveusingusingto getto getknownknownto to storestoreto helpto help