人教版八年级第七单元知识点

1、1. Today there are already robots working in factories.【解析】There be句型常表示“某处有某人或某物”。 There are always more than one hundred birds in the big tree every evening. 每天傍晚那棵大树上总会有100多只小鸟。【拓展】There be句型的用法：1)There与be中间可插入一些表示推测的情态动词、表示时态的短语和一些动词短语，以强调某种语气。 There must be some flowers in the box. 盒子里肯定有些鲜花。 T

2、here happened to be some money in my pocket. 我的口袋里碰巧有一些钱。 There will be a meeting this afternoon. 今天下午将有一场会议。注：be不能换成have。2)There be句型常与过去时间状语连用,构成一些固定句型，用于故事发生的开头，交代故事发生的时间。 Many years ago,there was such a beautiful girl called Cindy. 很久以前有一个叫辛迪的美丽女孩。3)There be句型可换成There come / go，以引起注意，加强语气。 There

3、 comes the bus. 公共汽车来了。4) There be句型中，其动词的单复数，常采用“就近原则”。 There is a desk, two chairs and three benches in the room. There are two chairs, a desk and three benches in the room. 5) There be或There加其他动词的句型，其反意疑问句一律用there? There is a cat in the garden, isn't there? There used to be no house here, use

4、d there / did there? 过去这儿没有房子，是吗？2.and they do simple jobs over and over again. 并且他们反复的干着简单的工作 【解析】over and over again是固定搭配，译为“反复的；多次”， 还可以说 over and over。 They sang the song over and over. 他们反复的唱着那首歌。 They called over and over again but nobody answered. 他多次打电话，但没人接。3. Fewer people will do such jobs

5、 in the future because they are boring, but robots will never get bored. 【解析1】此句中的get bored 译为“ 感到厌烦，感到无聊”。其同义词为：be bored. 二者的区别在于：get bored强调动作， be bored 强调状态。 英语中有很多过去分词或形容词都可以和get, be 连用。比如：tired，angry 等。 You won't be bored when you are hungry. 当你饿的时候你就不会觉得无聊了。 If you do the same things month

6、 after month, you may get bored. 如果你每月都做同样的事情，你可能会感到厌烦。【解析2】such作形容词，意思是“如此的”，“这样的”，修饰各种名词。 1) such这样的。如： It is such bad weather.天气如此恶劣。 2) such常和as搭配，表示一种类别。如： We enjoy such a voice as hers.我们喜欢象她那样的嗓子。 3) such常和表示结果的that从句搭配，表示“如此以至于”。如： It was such a hot day that we all had to stay at home.【拓展】su

7、chthat和sothat都可用来引出一个结果状语从句。由于such是形容词，所以that从句前有一个受such修饰的名词；而so 是副词，修饰形容词或副词，因此that从句前一般不出现名词。如： They are such kind-hearted teachers that people in the village all respect them. The exam was so difficult that many students failed to pass it.a) 如果名词是可数名词的单数形式，such和so的位置不同：such+a/an+形容词+单数名词 so+形容词+

8、a/an+单数名词such a hot day= so hot a dayb) 如果被修饰的不可数名词被much, little, 或复数名词被many, few等表示量的形容词修饰时，用so，不用such. so many books so little waterc) 当little表示“年纪小的”时，可用such+little+名词 There were such little children that they couldnt clean the room.4. Scientist James White thinks that robots will never be able t

9、o wake up. 【解析】be able to 意为“能够”，后接动词原形。 【拓展】can 和be able to的辨析： 相同点：两者都表示能力； 不同点： 1) can只有现在式和过去式，只用于一般现在时和一般过去时； 2) be able to可用于现在时、过去时和将来时，但它不可用于进行时； 3) 表示经过努力而成功的某一次动作, 只能用be able to. He _ drive a car. He _climb over the mountain before.5. But many scientists disagree with Mr. White. 但很多科学家不赞同怀

10、特先生的观点。【解析】这里的“disagree with ”译为“不同意；不一致；不适合”。 固定搭配：agree with sb. 同意某人（的观点） They disagreed with each other about the time and place of the accident. 他们在对事故发生的时间和地点彼此有分歧。 I strongly disagree with his views. 我强烈反对他的见解。 I completely disagree with Jack. 我完全不同意杰克的意见。6. If buildings fall down with people

11、 inside, these snake robots can help look for people under the buildings. 如果建筑物倒塌，人还在里面，这些蛇形机器人可以帮助在坍塌的建筑物里搜救伤者。【解析】fall down 的意思如下： 1）掉下，落下，跌倒：The old lady fell down in the street and broke her leg. 老妇跌倒在大街上，摔坏了腿。 2）拜倒，跪倒：They fell down before him. 他们拜倒在他面前。 3）倒塌：The old house soon fell down. 这座老房很

12、快就倒塌了。7. So Ill probably just keep a bird.【解析】keep v. “保持；维持；喂养” 1) keep + sb. / sth. +形容词，意为“使某人/某物” The job kept them busy for a year. 2) keep +形容词，意为“保持” The man ran up and down to keep warm. 3) keep + sb. / sth. doing ，意为“让某人/某物继续做某事” She kept us waiting for her at the station for an hour. 4) ke

13、ep + doing意为“继续做，坚持做” He kept running after her, trying to catch her. 8. alone  adj.单独的 adv. 独自地 He was alone in the house他一个人在屋里 。 I went to the movies alone. 我独自去看电影了。 【拓展】alone 表示“单独的，独自一人的”，不含感情色彩。做形容词时，只能在be动词或系动词之后做表语；与lonely不同，lonely表示“孤独的，寂寞的”含有丰富的感情色彩。lonely做形容词时，可做定语和表语。如：a lonel

14、y village 孤寂的村庄。9. seem 与 look 的区别：seem 和 look 的意思相同，但它们的着重点不同，用法有相同之处，也有一些差别 seem 指说话人内心的主观判断，而 look 则强调从所述事物外表上看得出的视觉印象 1. 两者后面都可接形容词名词动词不定式及介词短语例如：She seems/looks a nice teacher. 她看上去是个好老师 My mother seems/looks tired. 我母亲似乎很疲倦 The patient seemed/looked to be very ill. 那病人似乎病得很重 2. 两者后面都可接 as if （好像）引导的表语从句，但 seem 的主语一般是 it,而 look 的主语可以是 it,也可以是其他的名词或代词例如：She looked as if she slept badly. 看她那样子仿佛没有睡好 注：下列几种情况下不能用 look 取代 seem: 1. seem 后面接动词不定式 to do