1、UNIT 3FASCINATING PARKSDISCOVERING USEFUL STRUCTURES动词-ing形式作主语1.Even though the sun is brightly shining,_(tell)whether it is morning or night is impossible.(教材P26)2._(get)here is quite difficult,so apart from the Sami very few people have ever seen Sarek.(教材P26)tellingGettingFill in the blanks and
2、identify the function of the-ing form 动词-ing形式作主语3.For hundreds of years,_(look)after reindeer was a way of life for the Sami.(教材P26)4._(be)in such a beautiful and wild place makes me feel blessed to be alive.(教材P27)BeinglookingCan you find more sentences with the-ing form from the reading passage a
3、nd state their functions?1.I wake up to the sound of the wind buffeting the cloth of my tent.2.Checking my watch,I see that it is 7:30 a.m.3.Spreading out before me,branches of the Rapa River flow through the valley below.4.But every spring,a small number of Sami still follow their reindeer into the
4、 valleys of Sarek,living in tents or old cottages and enjoying their traditions.5.For example,this morning my breakfast is flat bread warmed over a fire,dried reindeer meat,and some sweet and sour berries that I found growing near my tent.6.Here I am,alone under this broad sky,breathing the fresh ai
5、r,and enjoying this great adventure.定语定语状语状语状语状语状语状语宾补宾补状语状语1.动词动词-ing形式作主语，表示一般或抽象的习惯性行为，谓形式作主语，表示一般或抽象的习惯性行为，谓语动词用语动词用_。eg Reading aloud _very important for us to learn a foreign language.Going to bed early and getting up early _ considered to be a good habit.单数单数isis2.有时为了句子平衡，避免头重脚轻,用it作形式主语，而把真
6、正的主语(动词-ing短语)后置。常见的固定句型有：动词-ing形式作主语It+be+a waste of time doing 做做是是浪费时间的浪费时间的It is/was no good/use/fun doing 做做是没益是没益/用处用处/意思的意思的It is/was useless/worthwhile doing 做做是没用是没用/值得的值得的2.有时为了句子平衡，有时为了句子平衡，避免头重脚轻避免头重脚轻,用用it作形式主语，而把作形式主语，而把真正的主语真正的主语(动词动词-ing短语短语)后置。常见的固后置。常见的固定句型有：定句型有：2.有时为了句子平衡，避免头重脚轻,
7、用it作形式主语，而把真正的主语(动词-ing短语)后置。常见的固定句型有：动词-ing形式作主语注意：注意：动名词作主语用动名词作主语用it 充当形式主语的情况很少，充当形式主语的情况很少，上表中是最常见的句式结构。不定式作主语时，常用上表中是最常见的句式结构。不定式作主语时，常用it 充当形式主语，如：充当形式主语，如：Its not easy to learn a foreign language well.学好一门外语不容易。学好一门外语不容易。Its difficult for us to finish the work in a week.对我们来说，一周之内完成这项工作很困难对我
8、们来说，一周之内完成这项工作很困难。2.有时为了句子平衡，避免头重脚轻,用it作形式主语，而把真正的主语(动词-ing短语)后置。常见的固定句型有：动词-ing形式作主语It is no use/no good _(cry)over spilt milk.It is a waste of time _(persuade)such a person to join us.cryingpersuading1 It is both challenging and rewarding to study abroad.2 It would hardly be possible to go on a hi
9、king tour in Sarek in winter due to the extreme cold.Studying abroad is both challenging and rewarding.Going on a hiking tour in Sarek in winter would hardly be possible due to the extreme cold.3 Honestly,it can be both exciting and terrifying to explore a vast unknown land.Honestly,exploring a vast
10、 unknown land can be both exciting and terrifying.Rewrite the sentences using the-ing form as the subject动词-ing形式作主语4 It is good to adopt a positive attitude,even when things are difficult.Adopting a positive attitude is good,even when things are difficult.5 It is strongly advised to hire local guid
11、es,because they can offer accurate knowledge of Sarek culture and history.Hiring local guides is strongly advised,because they can offer accurate knowledge of Sarek culture and history.动词-ing形式作主语3.动词-ing的复合结构作主语时，通常有两种形式：(1)形容词性物主代词+动词-ing(2)名词所有格+动词-ing_ made his teacher very angry.他再次迟到让老师很生气。_is
12、 a great help to his family.麦克回来工作对他全家来说都是一大帮助。His being late againMikes returning to work动词-ing形式作主语4.动词-ing与动词不定式作主语的区别：动词-ing作主语，常常表示抽象的习惯性或经常性的动作。而不定式一般表示一次性、具体性的行为。Delivering newspapers is his job.送报纸是他的工作。To deliver newspapers is his job today.送报纸是他今天的工作。动词-ing形式作主语当句型当句型“There is no.”表示表示“不允许
13、、禁止某种行为的发生或存不允许、禁止某种行为的发生或存在在”时，需用动名词作主语。时，需用动名词作主语。There is no denying that the environment is from bad to worse.不能否认环境状况正在逐步恶化。不能否认环境状况正在逐步恶化。There is no joking about such matters.这种事开不得玩笑。这种事开不得玩笑。动词-ing形式作主语总结表示经常性或习惯性的动作且常放句首形容词性物主代词+动词-ing名词所有格+动词-ing动词-ing作 主 语动词-ing的复合结构Its a waste time doin
14、g sthIts useless/no use/no good doing sthIts no fun doing sthit 作形式主语动词原形+-ing基本构成基本用法动词-ing与动词不定式作主语的区别达标检测STEP 2.单句语法填空单句语法填空1.It is no use (advocate)such a life in a remote village.2.His (not，get)to the station on time made everyone worried.3.Be careful！(play)with fire near the wood will be dange
15、rous.4.It is acknowledged that swimming (be)a good sport in summer.5.It is a waste of time (try)to persuade him to give up computer games.6.It is necessary for us students (help)each other in trouble.advocatingnot gettingPlayingistryingto help.完成完成句子句子7.on the beach.在海边度假很有趣。在海边度假很有趣。8.caused so muc
16、h trouble.汤姆这么粗心，惹来了不少麻烦。汤姆这么粗心，惹来了不少麻烦。9.for that young man is really great fun.对那个年轻人来说写英文小说很有趣对那个年轻人来说写英文小说很有趣。Toms being so carelessWriting English novelsIts fun spending the holiday10.Since then，has been his life goal.从那时起，寻找方法生产更多的水稻是他的人生目标。从那时起，寻找方法生产更多的水稻是他的人生目标。11.made him late for class.他早
17、上起晚了，导致他上课迟到了。他早上起晚了，导致他上课迟到了。finding ways to grow more riceHis getting up late in the morning.用所给动词的适当形式完成下面的短文用所给动词的适当形式完成下面的短文Tom spent most of his time searching for information on the Internet each day，which made his parents worried.In his fathers opinion,12.(sit)in front of a computer did grea
18、t harm to his sons health.However，he found that it was no use 13._(advise)Tom to spend less time on the Internet，for he wouldnt listen.Tom told his parents that that was what his job required.His mother wanted him to change his job，but Tom said that he was fond of it and 14.(stay)up late had become
19、his habit.There was no way，otherwise he wouldnt finish his task on time.sittingadvisingstayingIn my opinion，it is not wise to spend too much time on the Internet.15.(have)a rest regularly will be of great help while working at the computer.In addition,16.(set)aside some time to relax is also very important.HavingsettingGood bye
