资源简介

(共16张PPT)
Uni4
key sentence structures
Learning aims:
1.To grasp the key sentence structures：
（动名词做主语、（句首倒装）not only ....but also、不定式作定语）
2.To translate and make sentences with them
1.【句式点拨】动名词短语作主语
(1)单个的动名词(短语)作主语时，谓语动词要用单数形式。一般来说，动名词(短语)作主语表示一种抽象的或泛指的动作。
(2)下列句式中it是形式主语，动名词短语是真正的主语：
It is no use/good/point/harm doing sth.做某事是没有用处/好处的。
It is a waste of time doing sth.做某事是浪费时间。
It is worth doing sth.值得做某事。
【练一练】
(1)_______________________can help keep blood pressure levels down.吃这些食物有助于保持低的血压水平。
(2)__Learning to use deepseek_____ will help you solve many academic problems.学习用Deepseek将帮助您解决许多学术问题。
Eating these food
1.【句式点拨】动名词短语作主语
【练一练】
(3).Growing green vegetables _gives____(give)me a sense of accomplishment. 种植绿色蔬菜会给我一种满满的成就感。
(4). _Facing these challenges____ will show you what you're made of. 面对这些挑战会让你清楚自己究竟有多大能耐。
(5)It is no good ___talking____ （talk） about the same thing all the time. 一直谈论同样的事情是没有好处的。
(6)It is a waste of time ___arguing____ （argue） with Bill.
与比尔争论是浪费时间的。。
①He is always the last ___to leave_____ (leave) the classroom.
②Lang Ping became the first person in volleyball ___to win_____ (win) an Olympic gold medal as both a player and a coach.
③The girl is the best person ___to finish_____ (finish) the whole work.
④A build-it-yourself solar still is one of the best ways _to obtain_____ (obtain) drinking water in areas where the liquid is not readily available.
⑤Friedman points out that the green economy is a chance ____to keep____(keep) American strength.
不定式做定语
⑥It was the first play ____to win_________ (win) all three of these major awards.
⑦I don’t trust his promise _____to come________ (come)for a visit.
⑧The next thing _____to do________ (do) is to keep the machine on for five minutes.
⑨She is ___the first woman to work___________ (第一个工作的女性) in the desert.
⑩William is ___the last person to tell a lie_ (最不可能说谎的人).
不定式做定语
not only … but also … 可用于连接两个分句，并且not only位于句首时，第一个分句中的主语和谓语要部分倒装，即将谓语的一部分（如助动词、情态动词或系动词）置于主语之前。
Not only does the sun give us light but also it gives us heat.
太阳不仅给予我们光，而且给予我们热能。
Not only did he speak English correctly, but also he speaks it fluently.
他英语不但说得准确，还讲得流利。
Not only is this young man clever but also he is hardworking.
这个年轻人不但聪明，还勤奋。
1. 两个主语
Not only Mr Lin but also his son joined the Party two years ago.
两年前，林先生和他儿子都入党了。
2.连接两个谓语动词
I not only play tennis but also practise shooting.
我不但打网球，还练习射击。
3.连接两个地点状语
They speak English not only in class but also in the dormitory.
他们不但在班里讲英语，在宿舍也讲英语。
not only … but also … 连接两个主语时，谓语动词要和与其最近的主语保持人称和数的一致【就近原则】。
Not only the students but also the teacher was against the plan.
= Not only the teacher but also the students were against the plan.
不但学生们，而且老师也反对这个计划。
【句式点拨】not only...but also... 不仅...而且...
【练一练】
①He ___not only______ read the book，____but also___ remembered what he had read.
②Not only you but (also) she____has______ (have)to attend the ceremony.
③Not only _____did________ he make a promise，but (also) he kept it.
④Not only you but (also) I ______am______to blame.
⑤Not only___have I tried something new______ , but it allows me to learn to take on responsibilities.我不仅尝试了新事物，而且还学会了承担责任。
⑥Not only___is he knowledgeable______ but also he is ready to help others.
他不仅知识渊博而且还乐于助人。
⑦Not only _will these books make you more familiar with China_but also help improve your Chinese. 这些书不仅会使你更加熟悉中国，而且还有助于提高你的汉语水平。
(1)动名词作宾语
动名词可作动词、介词或形容词的宾语。
1. 动词宾语 ：She avoids eating junk food.（她避免吃垃圾食品。）常见后接动名词的动词：enjoy， finish， suggest， consider等。
2.介词宾语 ：He is interested in learning Spanish.（他对学西班牙语感兴趣。）
3.形容词宾语 ：I am busy preparing for the exam.（我忙于备考。）
(2)动名词作表语
动名词可作表语 位于连系动词后，说明主语的性质或内容。
1.Her dream is becoming a scientist.（她的梦想是成为科学家。）
2.The main task is collecting data.（主要任务是收集数据。）
(3)动名词作定语
动名词作定语 修饰名词，通常表示用途或功能。
a reading room（阅览室）→ 用途是阅读
a washing machine（洗衣机）→ 功能是洗衣
(4)动名词作状语
动名词作状语 通常是动名词与介词短语结合，表示时间、原因、方式等逻辑关系。
1.After finishing work， he went home.（完成工作后，他回家了。）2.She improved her skills by practicing daily.（她通过每天练习提升技能。）
(5)特殊句式 it形式主义
1.It’s worth doing… ：It’s worth visiting the museum.（博物馆值得一游。） 2.There’s no point in doing… ：There’s no point in worrying.（担心没有意义。） 3.Have difficulty (in) doing… ：They had difficulty solving the problem.（他们解决问题有困难。）
so位于句首的倒装句用法主要有三种情况 ：①so + 形容词/副词开头的强调句式，需部分倒装；②so表示“也”时需部分倒装；③so与such引导结果状语从句时的倒装结构。此外，当so表示肯定前文内容（主语相同）时不倒装。 1.so + 形容词/副词位于句首的倒装
当so后接形容词或副词，并与that构成结果状语从句时，采用 部分倒装 结构（助动词/系动词前置）：
结构 ：So + adj./adv. + 助动词/系动词 + 主语 + 谓语... + that从句
So cold was the weather that we stayed indoors（天气太冷，我们只能待在屋里）
So fast does light travel that its speed is unimaginable（光速快得难以想象）
2.表示“也”的倒装结构
当肯定前文所述内容同样适用于另一主语时，使用“ So + 助动词/系动词 + 主语 ”的倒装形式： You are young, and so am I（你年轻，我也年轻）
She speaks French, and so does he（她说法语，他也说）
3.so与such引导结果状语从句的倒装
当强调程度时，可将so/such提前至句首并倒装：
So + adj. + a/an + 名词 + 助动词 + 主语 + that从句 Such + 名词短语 + 助动词 + 主语 + that从句 So clever a student is he that he solves problems quickly（他如此聪明，能快速解题）
Such a loud noise did they make that we couldn't sleep（他们制造了如此大的噪音，我们无法入睡）
so句首倒装句与not only句首倒装句是作文里非常亮眼的句式，希望同学们认真掌握
1.This activity not only enhances our……skills but also broadens our horizons.
Not only can this activity enhance our……skills but also it will broaden our horizons.
这次活动不但能够提升我们（某方面的）水平还能够拓展我们的视野
2.(1) Some people were so moved by the sight that they began to cry.
这句话可以倒装为：So moved by the sight were some people that they began to cry. 有些人被眼前的景象深深打动，以至于开始落泪了。
(2) He has made such great progress that the teachers are pleased with him.
这句话可以倒装为：Such great progress has he made that the teachers are pleased with him. 他取得了如此巨大的进步，以至于老师们都很满意他。

展开更多......

收起↑