1、七年级英语下册Unit3系动词讲解和练习一、讲解1.用法：英语动词中,有的动词后面要接名词或代词等作宾语,有的可以单独作谓语,而有的则要接形容词或名词等作主语的补充成分。我们把后面接主语补充成分的动词称为系动词。系动词不能单独用作谓语，必须与表语一起构成系表结构。2.分类系动词主要有以下几种分类:（1）状态系动词:be (am, is, are, was,were )主要用于表示主语的特征、状态和身份。在一般现在时态中,有am,is,are三种形式,在一般过去时态中,am 和is变成 was, are 变成 were。另外,be 还有现在分词形式being 和过去分词形式been。 be 动词
2、基本的意思是“是”,但不能处处翻译为“是”。He is a teacher.他是一名老师。 He was busy.他当时很忙。I have been very busy these days.这些天我一直很忙。（2）持续系动词:keep, remain , stay表示人或事物的状态保持一致、没有发生变化,意为“保持”。She always keeps silent at the meeting.她开会时总保持沉默。Her room remains clean and tidy.她的房间一直保持干净整洁的状态。（3）表象系动词:look, seem, appear意为“似乎;好像”。He l
3、ooks very tired.他看起来很累。He seems ( to be ) very happy.他看起来很开心。（4）感官系动词:feel, smell, sound , taste表示感官感受。feel 意为“觉得,感到”， smell 意为“有气味”,sound 意为“听起来”,taste 意为“有味道”。Silk feels smooth.丝绸摸起来很光滑。 The milk smells sour.牛奶闻起来有股馊味儿。 The soup tastes good.这汤尝起来很美味。（5）变化系动词:become, grow , turn, fall, get, go表示主语变
4、成什么样。become表示结果，意为“变成,成为”;grow 表示逐渐变化的过程;turn 常指变颜色;fall一般指生病、睡觉等;get强调变化过程;go常指不好的变化过程,如go bad“变质”。 He becomes excited before the match.他在比赛前变得很兴奋。 He grew braver after this.这之后,他变得更加勇敢了。 Lisa turned red.丽莎脸红了。 Its getting dark.天色越来越暗。 He fell asleep.他睡着了。注意一般情况下,系动词没有进行时态,但是这些表示变化的系动词,是可以用进行时态的。It
5、 was becoming cold, so we lit the fire.天变冷了,所以我们点起了火。 The food is going bad.食物变质了。二、练习1.-Would you like to eat some fried chicken?一No, thanks.I think it _delicious but is unhealthy.A.soundsB.feelsC.tastesD.goes2.一Dad, what are you cooking? It_so good.一Mapo tofu.You will like it.A.getsB.smellsC.sound
6、sD.tastes3.(传统文化)-Your skirt _so special.-Oh yes , its very popular these days.Its a horse-face skirt.A.looksB.smellsC.tastesD.keeps4.Her face_pale (苍白的)when she heard the bad news.A.grewB.wasC.turnedD.got5.This pair of trousers_smooth because they are made of Chinese silk.A.feelsB.smellsC.tastesD.sounds【答案】CBACA2
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