外研版 (2019)选择性必修 第二册Unit 4 Breaking boundaries课文ppt课件

这是一份外研版 (2019)选择性必修 第二册Unit 4 Breaking boundaries课文ppt课件，共26页。PPT课件主要包含了 用法， 类型，it作形式主语等内容，欢迎下载使用。
Lk at the sentences and answer the questins. Sentences (a) and (c) are frm the reading passage.
1 What des “it” refer t in sentences (a) and (c)?2 Why des the authr chse t use sentences (a) and (c) instead f (b) and (d)?
a But it is vital nt t take any chances.b But nt t take any chances is vital.c It is imprtant t remember that Ebla desn’t respect natinal bundaries.d T remember that Ebla desn’t respect natinal bundaries is imprtant.
The first sentences in each grup use “it” as an empty subject at the beginning f the sentences. The reasn why sentences (a) and (c) are chsen is that the sentences are kept balanced and the key infrmatin f the sentences is emphasised.
Nw lk fr mre sentences with this structure in the reading passage, and summarise its use in yur wn wrds.
I felt it was my duty as a dctr t g there and ffer my help.It is s inspiring t have clleagues like Wiltn, Maisy and Alfns, , it is abslutely essential fr us all t cllabrate t create a glbal cmmunity with a shared future f peace and prsperity.
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。
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.
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。
1. 代表不定式(1) It + be + 形容词 + 不定式 It is difficult t translate the bk.(2) It + be + 名词 + 不定式 It was her duty t clean the rm.(3) It + be + 介词短语 + 不定式 It was against my principle t d that. (4) It + 及物动词 + 宾语 + 不定式 It cst 150 yuan t buy the dress.
在“It＋be＋形容词＋fr/f sb.t d sth.”句型 中，如果形容词描述的是sb.，则应用介词f； 如果描述的是t d sth.就用fr。It's necessary fr us t use a shrt­wave radi t pick up the prgrammes. 我们用一台短波收音机收听这些节目是必要的。It was flish f him t give up the jb. 他放弃那工作是愚蠢的。
2. 代表动名词it 代表动名词时，一般以“be + 名词”作谓语，也可以以“be + 形容词”作谓语。常限于n gd, n use, useless, waste等词的后面。 It is n gd/ use having a car if yu can't drive. It is a waste f time watching TV It is n use asking him.
3. 代表从句It + be + ……从句，具体可以分为四种类型：（1）it + be + 形容词 + 从句It is clear that he tld a lie.（2）it + be + 名词 + 从句It is a pity that yu can't cme.（3）it + 动词的被动语态 + 从句It is said that he is friendly.（4）it + be/其他系动词 + 从句It may seem that yu’re wasting yur life away.
It is clear / bvius / true / pssible / certain / … that…It is imprtant / necessary/ right / strange / natural / …that… (shuld) d…It is said / reprted / learnt / …that…It is suggested / rdered / required /…that... (shuld) is a pity / shame / …that…It happens / seems / lks /appears /…that…
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 desn’t matter whether / if …It lks /seems as if …It takes …(sme time) t d…It + be + a waste f time ding…It is/was n gd/use ding…It is/was wrth/wrthwhile ding…
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。
It指代不定式It指代动名词It指代从句
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
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 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.
Describe ne f the cities using it as an empty subject where apprpriate. D nline research if necessary.
Trnt Shanghai Lndn Sydney
The glbal village
Read the passage and answer the questins. Pay attentin t the expressins in bld.
What phenmenn des the passage describe?What effect des technlgy have n cultural exchange?
It describes the phenmenn f the “glbal village” as related t the prmtin f technlgical and cultural exchange.
Technlgy enables us t frm clse cnnectins with peple f cmpletely different cultures and gives us quick and easy access t ther cultures and lifestyles.
Cmplete the letter with the crrect frm f the expressins.
bringing peple tgether　channels f cmmunicatin　frm clse cnnectins withwindw n the wrld　be mre inclusive　culture shck　a jint effrt　mutual benefits
culture shck
frm clse cnnectins with
a jint effrt
mutual benefits
bring peple tgether
windw n the wrld
be mre inclusive
Listen t the cnversatin and chse the main idea.
1　Mre and mre freign wrds and expressins are entering the English language, especially thse abut fd. 2　Chinese fd is ppular in the UK, and many Chinese wrds and expressins are entering English dictinaries as a result. 3　Intercultural cmmunicatin is increasing, and peple all ver the wrld have a better understanding f each ther.4　Wrld sprts are bringing peple tgether in the same way that fd is.
Listen again and cmplete the table.
reginal wrds are making it
the fd we nw find in shps and restaurants
all kinds f fds
a lt f ther restaurants
Italian，French and Japanese restaurants
use chpsticks
cnnecting peple
peple in Britain eating Chinese fd
pizza while watching
the same game
Cmplete the bxes with the expressins frm the cnversatin.
Really? That’s interesting.Is it really?It is really amazing... I als find it interesting t wnder it isn’t a surprise t is nt unusual t find...
Really?That’s interesting.Is it really?
It is really als find it interesting t wnder it isn’t a surprise t is nt unusual t find...
Wrk in pairs. Talk abut anther phenmenn f the glbal village using the expressins in this sectin.
Review It as an empty subject.Wrk in grups t talk abut anther phenmenn f the glbal village using the expressins in this sectin.