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高中外研版 (2019)Unit 4 Breaking boundaries课前预习课件ppt
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这是一份高中外研版 (2019)Unit 4 Breaking boundaries课前预习课件ppt，共48页。PPT课件主要包含了 概念， 概念，课堂练习， 类型，it代表不定式，链接真题，to get，it代表动名词，it代表从句，学以致用等内容，欢迎下载使用。
外研版高中英语新教材选择性必修第二册
P3 Using language- Grammar
Unit 4 Breaking bundaries
It as an empty subject
深圳市罗湖区美术学校 皮雅
It is wise t fllw the instructins f the lcalauthrities.
t fllw the instructins f the lacal authrities是真正的主语
T fllw the instructins f the lacal authrities is wise.
When a flash fld warning is issued,
Fcus n 基本概念
Lk at the sentences and answer the questins. Sentence (a) and (c) are frm the reading passage.
通常it作为形式主语，在句中没有实际意义，只是满足语法需要，起到一个平衡句子结构，避免句子头重脚轻的作用。
1. I felt it was my duty as a dctr t g there and ffer my help. 2. It is s inspiring t have clleagues like Wiltn, Maisy, Alfns, nt t mentin all the thers I have wrked with.3. In a wrld still facing s many prblems, it is abslutely essential fr us all t cllabrate t create a glbal cmmunity with a shared future f peace and prsperity.
例句：（高考安徽卷） is ur hpe
that we will play a greater rle in the market place and, therefre, supply mre jbs.
一、把下列的句子变成用it的形式主语句。
1. T say gdbye is difficult fr me.
It is difficult fr me t say gdbye .
2. Playing t many cmputer games is a waste f time.
It is a waste f time playing t many cmputer games.
It is bvius that he is clever.
3.That he is clever is bvius.
形式句真正主语由什么结构承担？
通常it代替不定时、动名词、从句充当主语，起到一个平衡句子结构，避免句子头重脚轻的作用。
it代表不定式，又可以分为四种类型：
①It is difficult t translate the bk.②It is imprtant t understand the rules. ③It is helpful t study Chinese.
（1）it + be + 形容词 + 不定式
（2）it+be + 名词 + 不定式
①It is my hnur t help yu.②It was her duty t clean the rm.③It is a pleasure t have been wrking with yu in the past week.
（3）it + be + 介词短语 + 不定式
①It was against my principle t d that. ②It was beynd my ability t finish the jb n time.
（4）it + 及物动词 + 宾语 + 不定式
①It cst 150 yuan t buy the dress. ②It takes me 30 minutes t get t schl every day.
(2019•新课标III卷）On ur way t the huse, it was raining s hard that we culdn't help wndering hw lng it wuld take ________ (get) there. (2018•浙江卷) Many westerners wh cme t China ck much less than in their wn cuntries nce they realize hw cheap ___ can be t eat ut.
（1）it代表动名词，以“be+形容词”作谓语。
①It is pleasant sitting here.②It is gd hearing English spken.③It is terribly tiring wrking late like this.
①It is great fun sailing a bat.②It is n use/a waste f time crying fr spilt milk.
（2）it代表动名词，以“be+名词”作谓语。
it代表从句，具体可以分为四种类型：
①It is clear that he tld a lie.②It is natural that she knws everything abut it.③It was surprising that she passed the difficult exam.
（1）it + be + 形容词 + 从句
①It is a pity that yu can't cme.②It is a gd start that yu made a plan.
（2）it + be + 名词 + 从句
①It is said that he is friendly.②It is reprted that the temperature will decline sharply in ne r tw days.
（3）it + 动词的被动语态 + 从句
①It may be/seems that he views the issue frm a different perspective.②It may seem that yu’re wasting yur life away.
（4）it + be/其他系动词 + 从句
1. (2020•江苏卷）_____ is nt a prblem whether we can win the battle; it’s just a matter f time.
1. David wn first place in the maths cntest. What a surprise! _________________________________________
It’s a surprise that David wn first place in the maths cntest.
用“it作形式主语”结构，改写下列句子。
2. Her bk is said t have been translated int mre than 3 languages. ________________________________________________________________________________
It is said that her bk has been translated int mre than 3 languages.
3. Obviusly, the ld scientist desn’t care much abut mney r fame.__________________________________________________________________
It is bvius that the ld scientist desn’t care much abut mney r fame.
4. The baby seems t be getting mre curius abut everything arund him. ____________________________________________
It seems that the baby is getting mre curius abut everything arund him.
it作为形式主语的常见句型：
（1）It is clear / bvius / true / pssible / certain / … that…
（2）It is imprtant / necessary/ right / strange / natural / …that… (shuld) d…
It is bvius that he’s late.
It is necessary that yu d enugh exercises befre the race.
（3）It is said / reprted / learnt / …that…
It is reprted that a furteen-year-ld girl wn the game.
（4） It is suggested / rdered / required /…that... (shuld) d...
It is suggested that the meeting (shuld) be put ff.
（5）It is a pity / shame / …that…
It is a pity that yu didn’t see such a gd film.
（6）It happens / seems / lks /appears /…that…
It happens that I knw him.
（7）It desn’t matter whether / if …
It desn’t matter if yu miss the bus, because there’s anther ne 15 minutes later.
（8）It lks /seems as if …
It lks as if he is wrng.
（9）It + be + adj. + f sb + t d… It + be + adj. + fr sb + t d
① It is kind f yu t think s much f us.② It's nice f yu t help me.③ It's dangerus fr us t swim in such deep pl.④ It's necessary fr us t study hard.
形容词为描述人品质及性格特征的词。常用的形容词有clever/flish/gd/nice/plite/kind等。
形容词为描述事物特征的词，常用的形容词有difficult / imprtant / easy / hard/ necessary/ impssible/ dangerus等。
It's flish _____ yu t drive a car after drinking.It's necessary ______us t master a freign language.
（11） It + be + a waste f time ding…
It is a waste f time arguing with her.
（12） It is/was n gd/use ding…
It is n gd wasting time here.
（13） It is/was wrth/wrthwhile ding…
It is wrth trying t use new technlgy in educatin.
（10）It takes …(sme time) t d…
It tk us three hurs t get there.
Rewrite the underlined parts using it as an empty subject.
it is n lnger quite s difficult fr wmen and minrities t get rles in American film and televisin.
it is nw a mre realistic hpe fr minrity actrs t becme a leading actr in Hllywd.
it is mre cmmn than befre fr wmen t write and direct Hllywd films.
it is seen as acceptable by film studis t cast white actrs as Asian characters.
Check yur answers:
Describe the city using the infrmatin prvided and it as an empty subject.
Beijing tday is multicultural. It is nt a surprising thing fr students t see ...
Beijing tday is multicultural. It is nt a surprising thing fr students t see different skin clurs in the same class. It is pssible fr peple t hear many different languages and dialects. It is easy fr peple t find prducts frm all ver the wrld. It is nt difficult fr freigners t settle dwn and find a jb. It is a cmmn thing fr peple frm different cuntries t wrk in the same cmpany.
Pssible answers:
it作为形式主语，代替句子的逻辑主语，并无实际词义。这可以保持句子的结构平衡，避免主语太长，显得头重脚轻。
（1）It is clear / bvius / true / pssible / certain / … that…（2）It is imprtant / necessary/ right / strange / natural / …that… (shuld) d…（3）It is said / reprted / learnt / …that…（4）It is suggested / rdered / required /…that... (shuld) d...（5）It is a pity / shame / …that…（6）It happens / seems / lks /appears /…that…
（7）It desn’t matter whether / if …（8）It lks /seems as if …（9）It takes …(sme time) t d（10) It is + 形容词 +（f sb）+ t d…（11）It + be + a waste f time ding…（12）It is/was n gd/use ding… (13）It is/was wrth/wrthwhile ding…
Ⅰ. 用适当的内容或括号中所给单词的适当形式填空。
1. It is difficult fr them ___________ (cmplete) the prject n time. 2. Ms. Chen adds that _____ is imprtant fr teens t stp t have a rest regularly frm their cmputers r smart phnes and d sme physical activities.3. It is his duty _________ (prtect) the parts f the Great Wall frm being damaged. 4. It will be against my rule _________(say) smething fr yu befre ur bss. 5. It is n gd _______ (make) friends with thse wh are crazy abut playing vide games.
6. It is natural ______ we will wrk harder if we knw what we are wrking twards and why.7. ___ is reprted that this plant can prevent cancer. 8. ____ is a great hnur fr me t wrk with thse famus specialists frm all ver the wrld. 9. ____ happened that I was in his ffice when yu called him. 10. It’s expected ______ NASA’s gal will be realized by the year 2035.
It is knwn t us _______ the mbile phne plays a very imprtant part in ur life and wrk. Is it pssible fr us ________ (live) withut it? Perhaps the answer is NO. ____ is a habit fr mst peple t turn n their smart phnes and surf the Internet as sn as they wake up. And it seems that there is smething imprtant waiting fr them t deal with. What’s mre, sme peple spend all day playing games n the phne. We knw it is difficult fr them _______ (beat) their addictin. S ____ is ur duty t call n the public t reduce the time they spend n the phne.
Ⅱ.用适当的内容或括号中所给单词的适当形式，完成短文。
Can yu understand the usage f it as an empty subject? 2. Can yu describe a big city using it as empty subject where apprpriate?
外研版高中英语新教材选择性必修第二册
P3 Using language- Grammar
Unit 4 Breaking bundaries
It as an empty subject
深圳市罗湖区美术学校 皮雅
It is wise t fllw the instructins f the lcalauthrities.
t fllw the instructins f the lacal authrities是真正的主语
T fllw the instructins f the lacal authrities is wise.
When a flash fld warning is issued,
Fcus n 基本概念
Lk at the sentences and answer the questins. Sentence (a) and (c) are frm the reading passage.
通常it作为形式主语，在句中没有实际意义，只是满足语法需要，起到一个平衡句子结构，避免句子头重脚轻的作用。
1. I felt it was my duty as a dctr t g there and ffer my help. 2. It is s inspiring t have clleagues like Wiltn, Maisy, Alfns, nt t mentin all the thers I have wrked with.3. In a wrld still facing s many prblems, it is abslutely essential fr us all t cllabrate t create a glbal cmmunity with a shared future f peace and prsperity.
例句：（高考安徽卷） is ur hpe
that we will play a greater rle in the market place and, therefre, supply mre jbs.
一、把下列的句子变成用it的形式主语句。
1. T say gdbye is difficult fr me.
It is difficult fr me t say gdbye .
2. Playing t many cmputer games is a waste f time.
It is a waste f time playing t many cmputer games.
It is bvius that he is clever.
3.That he is clever is bvius.
形式句真正主语由什么结构承担？
通常it代替不定时、动名词、从句充当主语，起到一个平衡句子结构，避免句子头重脚轻的作用。
it代表不定式，又可以分为四种类型：
①It is difficult t translate the bk.②It is imprtant t understand the rules. ③It is helpful t study Chinese.
（1）it + be + 形容词 + 不定式
（2）it+be + 名词 + 不定式
①It is my hnur t help yu.②It was her duty t clean the rm.③It is a pleasure t have been wrking with yu in the past week.
（3）it + be + 介词短语 + 不定式
①It was against my principle t d that. ②It was beynd my ability t finish the jb n time.
（4）it + 及物动词 + 宾语 + 不定式
①It cst 150 yuan t buy the dress. ②It takes me 30 minutes t get t schl every day.
(2019•新课标III卷）On ur way t the huse, it was raining s hard that we culdn't help wndering hw lng it wuld take ________ (get) there. (2018•浙江卷) Many westerners wh cme t China ck much less than in their wn cuntries nce they realize hw cheap ___ can be t eat ut.
（1）it代表动名词，以“be+形容词”作谓语。
①It is pleasant sitting here.②It is gd hearing English spken.③It is terribly tiring wrking late like this.
①It is great fun sailing a bat.②It is n use/a waste f time crying fr spilt milk.
（2）it代表动名词，以“be+名词”作谓语。
it代表从句，具体可以分为四种类型：
①It is clear that he tld a lie.②It is natural that she knws everything abut it.③It was surprising that she passed the difficult exam.
（1）it + be + 形容词 + 从句
①It is a pity that yu can't cme.②It is a gd start that yu made a plan.
（2）it + be + 名词 + 从句
①It is said that he is friendly.②It is reprted that the temperature will decline sharply in ne r tw days.
（3）it + 动词的被动语态 + 从句
①It may be/seems that he views the issue frm a different perspective.②It may seem that yu’re wasting yur life away.
（4）it + be/其他系动词 + 从句
1. (2020•江苏卷）_____ is nt a prblem whether we can win the battle; it’s just a matter f time.
1. David wn first place in the maths cntest. What a surprise! _________________________________________
It’s a surprise that David wn first place in the maths cntest.
用“it作形式主语”结构，改写下列句子。
2. Her bk is said t have been translated int mre than 3 languages. ________________________________________________________________________________
It is said that her bk has been translated int mre than 3 languages.
3. Obviusly, the ld scientist desn’t care much abut mney r fame.__________________________________________________________________
It is bvius that the ld scientist desn’t care much abut mney r fame.
4. The baby seems t be getting mre curius abut everything arund him. ____________________________________________
It seems that the baby is getting mre curius abut everything arund him.
it作为形式主语的常见句型：
（1）It is clear / bvius / true / pssible / certain / … that…
（2）It is imprtant / necessary/ right / strange / natural / …that… (shuld) d…
It is bvius that he’s late.
It is necessary that yu d enugh exercises befre the race.
（3）It is said / reprted / learnt / …that…
It is reprted that a furteen-year-ld girl wn the game.
（4） It is suggested / rdered / required /…that... (shuld) d...
It is suggested that the meeting (shuld) be put ff.
（5）It is a pity / shame / …that…
It is a pity that yu didn’t see such a gd film.
（6）It happens / seems / lks /appears /…that…
It happens that I knw him.
（7）It desn’t matter whether / if …
It desn’t matter if yu miss the bus, because there’s anther ne 15 minutes later.
（8）It lks /seems as if …
It lks as if he is wrng.
（9）It + be + adj. + f sb + t d… It + be + adj. + fr sb + t d
① It is kind f yu t think s much f us.② It's nice f yu t help me.③ It's dangerus fr us t swim in such deep pl.④ It's necessary fr us t study hard.
形容词为描述人品质及性格特征的词。常用的形容词有clever/flish/gd/nice/plite/kind等。
形容词为描述事物特征的词，常用的形容词有difficult / imprtant / easy / hard/ necessary/ impssible/ dangerus等。
It's flish _____ yu t drive a car after drinking.It's necessary ______us t master a freign language.
（11） It + be + a waste f time ding…
It is a waste f time arguing with her.
（12） It is/was n gd/use ding…
It is n gd wasting time here.
（13） It is/was wrth/wrthwhile ding…
It is wrth trying t use new technlgy in educatin.
（10）It takes …(sme time) t d…
It tk us three hurs t get there.
Rewrite the underlined parts using it as an empty subject.
it is n lnger quite s difficult fr wmen and minrities t get rles in American film and televisin.
it is nw a mre realistic hpe fr minrity actrs t becme a leading actr in Hllywd.
it is mre cmmn than befre fr wmen t write and direct Hllywd films.
it is seen as acceptable by film studis t cast white actrs as Asian characters.
Check yur answers:
Describe the city using the infrmatin prvided and it as an empty subject.
Beijing tday is multicultural. It is nt a surprising thing fr students t see ...
Beijing tday is multicultural. It is nt a surprising thing fr students t see different skin clurs in the same class. It is pssible fr peple t hear many different languages and dialects. It is easy fr peple t find prducts frm all ver the wrld. It is nt difficult fr freigners t settle dwn and find a jb. It is a cmmn thing fr peple frm different cuntries t wrk in the same cmpany.
Pssible answers:
it作为形式主语，代替句子的逻辑主语，并无实际词义。这可以保持句子的结构平衡，避免主语太长，显得头重脚轻。
（1）It is clear / bvius / true / pssible / certain / … that…（2）It is imprtant / necessary/ right / strange / natural / …that… (shuld) d…（3）It is said / reprted / learnt / …that…（4）It is suggested / rdered / required /…that... (shuld) d...（5）It is a pity / shame / …that…（6）It happens / seems / lks /appears /…that…
（7）It desn’t matter whether / if …（8）It lks /seems as if …（9）It takes …(sme time) t d（10) It is + 形容词 +（f sb）+ t d…（11）It + be + a waste f time ding…（12）It is/was n gd/use ding… (13）It is/was wrth/wrthwhile ding…
Ⅰ. 用适当的内容或括号中所给单词的适当形式填空。
1. It is difficult fr them ___________ (cmplete) the prject n time. 2. Ms. Chen adds that _____ is imprtant fr teens t stp t have a rest regularly frm their cmputers r smart phnes and d sme physical activities.3. It is his duty _________ (prtect) the parts f the Great Wall frm being damaged. 4. It will be against my rule _________(say) smething fr yu befre ur bss. 5. It is n gd _______ (make) friends with thse wh are crazy abut playing vide games.
6. It is natural ______ we will wrk harder if we knw what we are wrking twards and why.7. ___ is reprted that this plant can prevent cancer. 8. ____ is a great hnur fr me t wrk with thse famus specialists frm all ver the wrld. 9. ____ happened that I was in his ffice when yu called him. 10. It’s expected ______ NASA’s gal will be realized by the year 2035.
It is knwn t us _______ the mbile phne plays a very imprtant part in ur life and wrk. Is it pssible fr us ________ (live) withut it? Perhaps the answer is NO. ____ is a habit fr mst peple t turn n their smart phnes and surf the Internet as sn as they wake up. And it seems that there is smething imprtant waiting fr them t deal with. What’s mre, sme peple spend all day playing games n the phne. We knw it is difficult fr them _______ (beat) their addictin. S ____ is ur duty t call n the public t reduce the time they spend n the phne.
Ⅱ.用适当的内容或括号中所给单词的适当形式，完成短文。
Can yu understand the usage f it as an empty subject? 2. Can yu describe a big city using it as empty subject where apprpriate?
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