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1、UNIT 1 ARTDiscover Useful Structures一一 lead in lead inRead these sentences and fill in the blanks using the correct words from the text on Pages 2 and 3.Discuss with your partner the function of the italicised infinitives.1.Perhaps the best _ to understand Western art is to look at the development o
2、f Western painting over the centuries.way2.During the Middle Ages,the _ of Western art was to teach people about Christianity.3.In this work,Monets _ was to convey the light and movement in the scene.4._ was no longer show reality,but instead to ask the question,“What is art?”purposeaimWhat they att
3、empted to do 二二二二 Infinitives as the predicativeInfinitives as the predicativeInfinitives as the predicativeInfinitives as the predicative动词不定式作表语What is a predicative?表语常由名词、形容词、副词、介词短语、动名词、不定式、从句来充当，是指说明主语的身份、性质、品性、特征和状态的词或从句，常位于系动词之后example sentences:She looks much younger in her red dress.They s
4、eem to have misunderstood me.The meat will stay fresh for several days in the fridge.He never keeps angry for a long time.What is a copula?系动词，只称系动词，是用来辅助主语的动词。它本身有词义，但不能单独用作谓语，其后必须跟表语，构成系表结构说明主语的状况、性质、特征等情况。在英语中，系动词的功能主要是把表语(名词、形容词、某些副词、非谓词、介词短语、从句)和它的主语联系在一起，说明主语的性质、特征、品性或状态。它有自己的但不完全的词义，不能在句中独立作谓
5、语，必须和后面的表语一起构成句子的谓语。系动词分为五种1、状态系动词用来表示主语状态,只有be一词,而且主语不同，be的形式也不同，且有时态的变化。这是我们最常见的系动词。She is very beautiful.她非常漂亮。2、持续系动词用来表示主语继续或保持一种状况或态度,主要有keep,rest,remain,stay,lie,stand等He always kept silent at meeting.他开会时总保持沉默。3、感官动词感官动词主要有feel,sound,seem,smell,sound,taste,appear,look等 He looks tired.他看起来很累。
6、It sounds to me as though theres a tap running somewhere.我好像听到某处水龙头流水的声音。She felt as if her head were splitting.她仿佛觉得她的头要裂开了。The river appeared as if enveloped in smog.那条河好像笼罩在烟雾之中。4、变化系动词这些系动词表示主语变成什么样,变化系动词主要有become,grow,turn,fall,get,go,come,run.He became mad after that.自那之后,他疯了。She grew rich wit
7、hin a short time.她没多长时间就富了。5、终止系动词表示主语已终止动作,主要有prove,trun out,表达证实,变成之意.The rumor proved false.这谣言证实有假。The search proved difficult.搜查证实很难。His plan turned out a success.他的计划终于成功了。Infinitives as the predicative1.结构结构 动词不定式可以放在be,become,sound,taste等_后面作表语。They are to marry next week.他们将在下周结婚。系动词2.功能功能表
8、示目的。The purpose of education is to develop a fine personality in children.教育的目的是发展儿童好的品格。（目的）表示事态发展的结果、预期的结果、不幸的命运或语言。You must speak out,if we are to remain friends.如果我们还想继续做朋友的话，你就必须痛痛快快地把话都说出来。用于第一人称疑问句，表示征求意见。What am I to do if I have no money?如果没有钱，我该怎么办呢？用于被动语态，相当于can/could,should,ought to,must
9、,具有情态意义You are to be rewarded.你应该受到奖励。表示“同意、安排、命令、决定、劝告、意愿、禁止”等。Children are not to smoke.儿童不准吸烟。You must be patient and persistent if you are to succeed.想要成功，就必须有耐心，有毅力。不定式作表语，可用主动形式表示被动意义。She is to blame.她应该受到责备。动词不定式作表语省略动词不定式作表语省略to的情况的情况当主句主语部分含有实义动词当主句主语部分含有实义动词do的某种形式时，可省略作表语的动词的某种形式时，可省略作表语的
10、动词不定式（短语）里的不定式符号不定式（短语）里的不定式符号to:All we need to do is live each day with hope.我们需要做的就是怀有希望过好每一天。我们需要做的就是怀有希望过好每一天。What they attempted to do was draw public attention.他们试图做的是引起公众关注。他们试图做的是引起公众关注。练习他的梦想是成为一名演员他的梦想是成为一名演员。（汉译英）。（汉译英）_I think it is your brother who is _(blame)for the accident.(单句语法填空)His dream is to become an actor.to blame谢谢观看2 0 2 0