Unit 3 重点单词
1. impression n. 印象；感想；印记
(1) n.make/leave a(n)..... impression on/upon给……留下..... 的印象
He left a good impression on me.
(2)vt.impress使印象深刻；使铭记；打动
impress sb with sth某事（物）给某人留下深刻印象 The girl impresd her friends with humor.
be impresd by/with对……印象深刻;某事（物）给某人留下深刻印象 I'm deeply impresd by the scenery.
impress on sb sth= impress sth on sb 某事（物）给某人留下深刻印象; 使某人牢记，注意到某事（物）
My father impresd on me the value of hard work.
= My father impresd the value of hard work on me.父亲让我铭记努力工作的重要性。
(3)adj. impressive 给人印象深刻的；感人的 The film was so impressive that we couldn't help crying.
2. take up
(1)拿起 He takes up a pen and writes down his name.
(2)接受 In order to get the job, I have to take up his suggestion.
(3)开始（从事）；学着（做） I have take up teaching since I graduated from university.
(4)占据（时间，空间等） Writing the paper took up most of the time. 写那篇论文占去了周末的大部分时间。
3. 洋洋得意是什么意思surround
(1)n. surroundings 周围的事物；环境 Happiness comes from your inner life, not from your surroundings.
(2)adj. surrounding 周围的；周边的
(3)vt. surround 包围；环绕 be surrounded 被....环绕着；周围都是
The old man is surrounded by a group of children.目不窥园的意思
4. lack
(1)n. (a) lack of缺乏；缺少 for/due to/becau of 因缺乏....
A lack of food caud her to grow weak. I'm not worried about her lack of experience.
(2)v. lack sth 缺少某物 （否定句中一般用 lack for sth）
He really lacks confidence. She does not lack for friends.
5. lo 看不见 catch 看见，发现 The place was so crowded；we soon lost sight of him.
in/within sight 在视野内 out of sight 不在视野内 Hurry up! The bus is already in/within
sight.
come into sight 进入视野 go out of sight 从视野中消失The town came into sight when we turned the corner.
lo one's sight 失明 He lost his sight six years ago.
晚会开幕词6. speed
(1)speed up 加速，使......加速They have speeded up the production of the new car.他们加快了新汽车的生产速度。
(2) at a/the 以....的速度 at (a)high/low speed以高速/低速
The car went at a speed of 100 kilometers an hour. The population of Beijing grew at a low speed.
7. dert
(1) vt.dert [di'zə:t] 抛弃，遗弃，放弃 Helen was derted by her husband.
(2)n. dert ['dezət] 沙漠，荒原
(3)adj. derted [di'zə:tid] 无人居住的，空无一人的，被抛弃的
To his surpri, he found a derted hou in the dert.使他吃惊的是，他在沙漠里发现了一所无人居住的房子。
8. instant
(1)n. 瞬间；片刻 for an instant 片刻 at that instant 在那一瞬间
Just for an instant I thought he was going to refu. At that instant the light went off.
(2)adj. 立即的；立刻的 The telegram asked for an instant reply. 这封电报要求立刻回复。
“一.....就.....”大盘点;
(1)as soon as 引导的时间状语从句。 As soon as he finished his classwork, he ran out of the classroom.
(2)the moment/minute/引导的时间状语从句。 She began to cry the instant she read the letter.
(3)immediately/directly/instantly作连词引导的时间状语从句。The boy burst into tears instantly he saw his mother.
(when (5)han (6)”on/upon+doing”结构
过去分词(短语)作状语
1、过去分词（短语）作状语
表示被动和完成，修饰谓语动词，进一步说明动作发生的背景或情况，在意义上相当于状语从句，可以跟状语从句转换，表示时间、让步、结果、方式等。其逻辑主语为句子的主语，两者之间为动宾关系。
用法 | 位置 | 例句 |
时间状语 | 句首、句尾或主句与谓语之间 | Asked about his family,he made no answer.旅游海报 少年犯电影当被问及自己的家庭情况时，他没回答。 |
条件状语 | 句首 | Given more time, we will do it well. 如果给我们更多的时间，我们会把它做好。 . |
原因状语 | 多置于句首 | Written in a hurry, this article was not so good. 因为写得匆忙，这篇文章不是很好。 |
伴随或方式状语 | 句首，句末或句中（相当于由and连接的并列结构） | The teacher entered the classroom, followed by a group of his students. =The teacher entered the classroom and he was followed by a group of his students. 老师走进教室，后面跟着他的一群学生。 |
用呼风唤雨造句让步状语 | 多用于句首 | Explained a hundred times, the problem still can’t be understood.即使解释100遍，这个问题仍旧不能被理解。 |
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注意：
（1）过去分词（短语）常跟when，while，until，if, unless，although，though，as if，even if等连词一起用，使其表示的时间、条件、让步意义更明确。
When（he was）asked about the cret of his success, he owed it to his friends’ help.(省略句)
Though（they were）warned of the storm,the farmers were still working in the fields.
Unless(I am) invited, I will not attend the meeting
（2）分词作状语，其逻辑主语必须与句子主语一致，否则，必修加上自己的逻辑主语，构成独立主格结构。
If caught, the police will punish the thief.(错误)
If caught, the thief will be punished by the police.(正确)
The children went home from the grammar school, their lessons finished for the day.
孩子们从语法学校回家，他们当天的作业做完了。
Weather permitting, we’ll have an outing（郊游）tomorrow.
（3）有些过去分词因来源于系表结构，作状语时不强调被动而重在描述主语的状态。这样的过去分词及短语常见的有：lost（迷失的），ated（坐)，hidden(躲)，lost/absorbed in（沉浸于），dresd in(穿着)，tired of（厌烦）等。
Lost in thought, he didn’t hear the bell.
2、手机闪退怎么办过去分词（短语）与现在分词（短语）作状语的区别
