英语选择性必修 第三册Unit 4 A glimpse of the future优秀ppt课件

这是一份英语选择性必修 第三册Unit 4 A glimpse of the future优秀ppt课件，共19页。PPT课件主要包含了单元语法等内容，欢迎下载使用。

Lk at the sentences frm the reading passage and answer the questins.
1　Why is 50 per cent singular in sentence（a） but plural in sentence（c）? Because in sentence（a），the part“50 per cent”is fllwed by the uncuntable nun“time”，while in sentence（c），the part“50 per cent”is fllwed by the cuntable nun“jb”in its plural frm. 2　What are the subjects in sentences（b）and（d）? Are they singular r plural? In sentence（b），the part“Every recmmendatin”is the subject. In sentence（d），the part“nne f us”is the subject. Bth are singular.
Subject-verb agreement（2）
Nw lk fr mre sentences fllwing this rule in the reading passage， and summarise the use f subject-verb agreement in yur wn wrds. Mre sentences fllwing this rule： · The technlgy yu’re using and enjying tday is a basic frm f AI... · Nearly every jb is ptentially at risk in the lng run. · I believe mst f the value f AI lies in its capacity t analyse and interpret vast amunts f data... The use f subject-verb agreement： When a percentage mdifies the plural frm f a cuntable nun，the verb shuld als be used in the plural frm. When a percentage mdifies an uncuntable nun，the verb is singular.
Nwadays，sme cmpanies ffer genetic testing fr children’s talents. A large number f clients have/has been attracted t it. They are parents，eager t knw what talents their children may have in the future. The prcess is simple. Every child prvide/prvides a small sample f bld r bdy tissue. This is/These are analysed. Each f the children is/are given a reprt shwing their pssible talents. A recent example cited n the website is that ne f the testing cmpanies cmpare/ cmpares the talents f twins Bbby and Benny. Bbby was assessed and his talents was/were revealedt be mstly scientific：a 66% chance f success in chemistry and 54% in physics was/were shwn. Meanwhile，Benny’s highest scre was/were shwn t be in an arts subject：the test gave him 68% fr literary studies. Is genetic testing reliable? Sme scientists say that mre evidence is/are needed.
Cmplete the passage by chsing the singular r plural frm.
Cmplete the descriptin accrding t the charts，paying attentin t subject-verb agreement.
FUTURE Last week，we asked yu t design yur ideal planet fr peple n Earth t live n in the 22nd century. We have received ver 500 entries and have been amazed by yur imaginatins! Here’s ne f the designs.
Three quarters f the surface is made up f land，while the rest is sea，cvering 25% f the surface. Half f the land is cvered with trees. Residential area and arable land bth accunt fr the same prprtin，20% f the ttal land. The rest is desert， cvering 10% f the ttal land. There are three kinds f peple. Fifty per cent f the peple are riginal residents，30% are frm Earth and 20% are frm ther planets.
Describe anther planet fr the future，paying attentin t subject-verb
In the thirtieth century，peple will leave Earth t live n anther planet. There are n seasns there. T make sure there is enugh xygen， humans will live under a huge glass canpy. Humans get 90 per cent f their nutritin frm prcessed pills， because mst f the surface f the planet is cvered by rck and plants can’t grw there.
1 语法一致原则语法一致原则是指主语和谓语在语法形式上保持一致。通常情况下，主语是单数形式，谓语动词也用单数形式；主语是复数形式，谓语动词也用复数形式。（ 1）不可数名词或可数名词单数作主语时，谓语动词用单数形式；可数名词复数作主语时，谓语动词用复数形式。Knwledge is pwer. 知识就是力量。The student studies very hard. 这个学生学习非常努力。The students study very hard. 这些学生学习非常努力。
（2）单个的不定式（短语）、动名词（短语）或从句作主语时，谓语动词一般用单数形式。T see is t believe. 眼见为实。Staring at smene is implite. 盯着人看是不礼貌的。What he said has been recrded. 他说的话已被录音。【学法点拨】当 what 引导的主语从句表示复数概念时，谓语动词用复数。What we badly need are gd teachers. 我们急需的是好老师。（ 3）当主语后面接 with，tgether with，alng with，like，in additin t，as well as，including，rather than，besides，except，but 等连接的词语时，谓语动词与前面的主语保持一致。Steve，tgether with his wife，is mving ff tnight.史蒂夫和妻子将于今晚出发。
（ 4）不定代词 each，either，neither 及由 sme-，any-，n-，every- 构成的复合不定代词作主语时，谓语动词用单数形式。Believe it r nt，everyne here has a gift fr music.信不信由你，这里人人有音乐天赋。【学法点拨】“either/neither f + 复数名词/ 代词复数”作主语时，谓语动词一般用单数形式，但在口语或非正式文体中也可以用复数形式。Either f the stries is/are entertaining.这两个 故事中的任何一个都很有趣。（ 5）由 （each）...，（every）...，（n）...，many many a... 连接的两个名词作主语时，谓语动词用单数形式。Each teacher and（each）student was given a ticket.给了每一位老师和学生一张票。
（ 6）“many a/mre than ne + 可数名词单数”作主语时，尽管从意义上看是复数，但谓语动词仍用单数形式。Many a student was n the spt when the accident happened.事故发生时，许多学生在现场。（ 7）“ne and a half + 复数名词”作主语时，谓语动词一般用复数形式。但如果中心词是表示金钱、距离、时间等的词，常被看作是一个整体，谓语动词习惯上用单数形式。One and a half apples are left n the table. 桌子上留下了一个半苹果。One and a half hurs is enugh fr me t finish the sculpture.对我来说，一个半小时足够完成这尊雕塑。
（8）“ne f + 可数名词复数”作主语时，谓语动词用单数形式。One f the students in ur class is a Canadian.我们班里有一名学生是加拿大人。【误区警示】在“ne f + 可数名词复数 + 定语从句”结构中，定语从句的谓语动词用复数形式。当 ne 前面出现 the nly，the very 等修饰语时，定语从句的谓语动词用单数形式。He is ne f the students wh have a gift fr music.他是有音乐天赋的学生之一。He is the nly ne f the students wh has a gift fr music.他是唯一一个有音乐天赋的学生。
（ 9）一些形式为复数但表达单数意义的名词如 trusers，pants，shes，glasses，scissrs 等作主语时，谓语动词用复数形式。但当这类名词前有 pair 修饰时，要根据pair 的单复数来确定谓语的单复数形式。Her glasses are new. 她的眼镜是新的。This pair f scissrs belngs t the tailr. 这把剪刀是这个裁缝的。（10）在倒装句中，谓语动词与其后的主语保持一致。Between the tw buildings is a mnument.两座建筑物之间矗立着一座纪念碑。
单句语法填空（1）［ 词汇复现］She ______________（be） an utstanding architect.（2）［词汇复现］We all ______________（hate） vilence.（3）The prfessr ______________（be） ften invited t many universities t deliver lectures.（4）［词汇复现］The members ______________（be）ging t attend the memrial service t be held at the lcal church.（5）Wrking n this prject ______________（be）challenging，but they are nt afraid.（6）T adpt his suggestin ______________（be） a wise chice.（7）Whether he cmes r nt ______________（be）f n matter.（8）She，alng with the ther students，______________（have） learned hw t type.
（9）Our schl，rather than their schls，______________（build） in the 1950s.（10）The teacher as well as the students ______________（like） this painting.（11）Anyne here ______________（attend） the meeting every mnth.（12）Neither f them ______________（be） interested in the cmedy.（13）Many a by and many a girl ______________（have） seen this painting.（14）At that time，everything was silent. N sund and n vice ______________（be） heard.（15）The final exam is appraching. Every hur and every minute ______________（be） imprtant fr us.（16）Mre than ne persn ______________（be）against the prpsal.
（17）One and a half years ______________（have）passed befre I knw it.（18）One f the biggest challenges ______________（be） finding a high-quality，lw-cst manufacturer.（19）He is ne f the teachers wh ______________（have） been t Eurpe.（20）He is the nly ne f the teachers wh______________（have） been t Eurpe.（21）My scissrs，f gd quality，______________（be）made f steel.（22）This pair f grey trusers，my favrite，______________（buy） last week.（23）As usual，after the exam ______________（be）the time fr rest，when students are very happy.（24）As everyne knws，in the huse by the river______________（live） a wealthy farmer.
完成句子（25）Whether he will cut dwn his nvel ______________（是未知的）.（26）He wrte many children’s bks，nearly half f which ____________________________　　　　（在20 世纪90 年代出版）.
were published in the 1990s
2 就近一致原则就近一致原则是指谓语动词的人称和数与最近的主语保持一致。（ 1）由 r，，，nt （als）...， 等连接的两个名词或代词作主语时，谓语动词的人称和数与最近的主语保持一致。Either my sisters r my mther is cming.不是我的姐妹们就是我的妈妈要来。（2）there be 句型中，be 动词的单复数与最靠近它的名词保持一致。There is a table and fur chairs in the rm.房间里有一张桌子和四把椅子。
单句语法填空（1）Neither the students nr the teacher __________（knw） the reasn why she behaved strangely.（2）Nt nly I but als he __________ （lk）dwn upn thse wh always rely n thers.（3）Nt nly the students but als the teacher __________ （be） active in sprts.（4）There __________ （be） a bk，tw pens and three pencils n the desk.