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系动词及其用法系动词用于连接主语和表语，说明主语状态，性质，特征或身份表语通常由名词、形容词，或相当于名词或形容词的词或短语等充当, 说明主语是什么或怎么。
常见的系动词是＞3它的变化形式为：am/is/are/was/wer.I am astudent R是一个学生。
Sunday s the firstdayof the week.星期天是一周的第一天。
They are veryhappy他们很开心。
It was a good day yesterday^ 天天气不错。
除了be动词，其他的系动词大致可分为四类:1 .“感觉”:类五种感觉器官相关的动词。
常见的有100k（看起相，touch/fee（摸上为，smel（闻起来），tast（尝起河soun （听起相等。
例如:Youdon’t look happy你看起来不开心。
Yourhand feels cold.你的手摸起来很凉。
Theflower smells good.这花闻起来很香。
Thefood tastes good.这食物尝起来味道很好。
Hervoice sound likemy mother's.她的声音听起来像我母亲的。
2 .“主观判断”:类包括seen（似乎用，appea（似乎、显得，prov （证明剧turnout（结果是证明是）等.例如:He appears/seen to be veryfriendlywith us他似乎对我们很友好。
Thesefacts proves that he isa good student这些事实证明他是一个好学生。
Hisplan turnedout a success的计划结果是成功的。
（他的计划成功了。
3 .“状态变化”:类示主语从一种状态变化成另一种状态。
常见的有becomejturn,grow,go,comefall,get 等。
例如：My father became a teachedastyear.我爸爸去年成为了一名老师。
Unit3专题-系动词A系动词beHe is a student. 是（一般现在时）+名词Money isn’t everything. 不是（一般现在时）+代词She was the first one to arrive. 是（过去时）+数词Seeing is believing 就是（一般现在时）+动名词This is what my grandma says.是（一般现在时）+名词性从句He was rich. 无法翻译/很（一般过去时）+形容词He is with his friends. 无法翻译（一般现在时）+介词短语My dad is often abroad. 在（一般现在时）+副词Our city will be more beautiful in the future．无法翻译/很(将来时)+形容词比较级I am speaking 正在（现在进行时）此处be+doing 表时态，不属于系动词。
The room was cleaned yesterday.被(过去时)此处be+done 表被动语态,不属于系动词。
1.系动词(亦称连系动词)本身有词义，但不能单独用作谓语，后须跟表语，构成系表结构，表示人或物的状态。
2. 系动词be 后面的表语可以用名词（名词、代词、数词、动名词、不定式、名词性从句）此时一般be 翻译成“是”系动词be 后面的表语可以用形容词（形容词，现在分词、过去分词、介词短语、副词、副词短语）此时一般be 无法翻译，有的可以笼统翻译成“很”3. be动词是一类系动词的总称，我们通常认为be动词是状态系动词。
对于不同的时态、人称而言，be动词有各种形式，如am，is，are，was，were，will be，have been，has been等。
B 0ther linking verbs其他系动词练习：一、用括号中所给单词的适当形式完成下列句子1 The boy looked ________ in his brother's baggy trousers. (fun)2 Qian Xuesen, the father of China's aerospace, has been ____ for years. (death)3 The man looked ________ . What happened to him? (anger)4 The mother looked ________ although the little boy was so naughty. (happily)5 Egypt and Thailand are ________ places to pay a visit to. (wonder)6 After following the doctor's advice, Michael looks _______ than before. (health)7 I felt so ________ after running a marathon. (tired)8 Her face turned even ________ when the teacher praised her. (red)9 Though he isn't famous, his book sells ________ . (good)10 My ambition is to ________ an engineer when I grow up. (became)二、选择括号中的单词完成下列句子1 Tom ________ too excited to fall asleep. (kept, felt)2 The girl ________ much more beautiful after she made herself up. (became, felt)3 When people ________ older, their memory usually becomes worse. (get, feel)4 The machine has ________ wrong. The mechanics will come in two hours. (become, gone)5 Your idea ________ great. We may have a try. (looks, sounds)三、选择最恰当的答案( ) 1 What's the matter with you? You look so ________ .A. excitingB. paleC. happyD. sadly ( )2 .The music ________ so wonderful that I keep playing it on my mobile phone.A. soundsB. hearsC. listensD. looks ( ) 3 .The cheese cake smells so ________ that everyone wants to have a bite.A. bigB. wellC. nicelyD. good ( ) 4 The ice cream ________ so nice, but it doesn't ________ delicious at all.A. looks, tasteB. sees, tasteC. looks, eatD. sees, eat ( ) 5 I'm afraid I'm not feeling ________ . Can I ask for leave?A. goodB. healthyC. wellD. healthily ( ) 6 Look at the dark clouds in the sky. It ________ that it's going to rain.A. seemsB. turnsC. becomesD. looks ( ) 7 I prefer the purple scarf because it ________ than the blue one.A. feels softB. feels softerC. touches softD. touches softer ( ) 8 When Ann saw the white figure in the dark, she turned ________ .A. cleanB. frighteningC. scaryD. pale ( ) 9 The hotels in Dubai are ________ to live in. I like them very much.A. comfortableB. uncomfortableC. comfortablyD. comfort ( ) 10 The food has ________ bad. You'd better keep it in the fridge next time.A. gotB. goneC. comeD. tasted( )11 The leaves of the maple trees ____ red in fall and they attract a lot of tourists.A. turnB. seemC. appearD. change ( ) 12 The young writer's new novel made a hit and it sold quite ________ .A. goodB. wellC. quickD. terrible ( ) 13 In winter, days are getting ________ and it turns dark before school is over.A. shortB. longC. shorterD. longer ( ) 14 James ________ very angry after he heard the news.A. keptB. turnedC. gotD. sounded ( )15The mother looked ___ at her son, feeling sorry for not sending him to school.A. happyB. happilyC. sadD. sadly ( ) 16 There's going to ________ a school party this Saturday evening.A. haveB. holdC. beD. be held ( ) 17 Tom ________ his father very much.A. is likeB. likesC. looksD. is liked ( ) 18 Coffee is ready. How nice it ________ !A. looksB. smellsC. soundsD. feels ( ) 19 I really feel ________ . I wish I could lie down in a soft bed right now.A. tiredB. tiringC. boringD. excited ( ) 20 I don't care if the dish looks ________ , but I hope it tastes ________ .A. good, wellB. bad, goodC. badly, goodD. well, good。
系动词系动词亦称联系动词（Link Verb），作为系动词，它本身有词义，但不能单独用作谓语，后边必须跟表语（亦称补语），构成系表结构说明主语的状况、性质、特征等情况。
说明：有些系动词又是实义动词，该动词表达实义时，有词义，可单独作谓语，例如：He fell ill yesterday.他昨天病了。
（fell是系动词，后跟补足语，说明主语情况。
）He fell off the ladder.他从梯子上摔下来。
fell是实义动词，单独作谓语。
1）状态系动词用来表示主语状态，只有be一词，例如：He is a teacher.他是一名教师。
（is与补足语一起说明主语的身份。
）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, 例如：He always kept silent at meeting.他开会时总保持沉默。
3）表像系动词用来表示"看起来像"这一概念，主要有seem, appear, look, 例如：He looks tired.他看起来很累。
He seems (to be) very sad.他看起来很伤心。
4）感官系动词感官系动词主要有feel, smell, sound, taste, 例如：This kind of cloth feels very soft.这种布手感很软。
This flower smells very sweet.这朵花闻起来很香。
5）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例如：He became mad after that.自那之后，他疯了。
She grew rich within a short time.她没多长时间就富了。
6）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，例如：sThe rumor proved false.这谣言证实有假。
