沪教牛津版牛津版七年级下册英语知识点总结Unit4Savethetrees

沪教牛津版牛津版七年级下册英语知识点总结
Unit4Savethetrees
沪教牛津版牛津版七年级下册英语知识点总结
Unit4 Save the trees
重点短语：
1.save vt. 拯救；解救
Eg. Let’s do something to save the animals in danger.
The police saved the child from the fire.
【拓展】save “节省、储蓄” Eg. save money save time
【变形】safe adj. safety n.
2.discuss vt “讨论” 后接名词（短语）或wh-从句及wh-短语
discussion n.
Eg. We discussed the problem.
We will discuss who should do it.
We will discuss what to teach next term.
3.leaf n. “树叶”复数：leaves
Eg. The fall of one leaf is enough to tell the coming of autumn. 一叶知秋。

The leaves turn green in spring. 变绿
4.help+do = help + to do “帮忙做……”
help+名词+（to）do “帮（某人）做……”
Eg. I helped (to) wash the car.
I helped him (to) look for his key.
【拓展】help+with...或help+名词+with... “在某方面帮忙”
Eg.Can I help you with your work?
Can you help me with my homework, Mary?
5.fight for... “为……而战”fight过去式：fought
fight against “与……作斗争”
Eg. He is fighting against his sickness.
They fight for freedom.
6.provide sb. with sth. = provide sth. for sb. 提供给某人……，为某人提供…… Eg. Sheep provide us with wool. = Sheep provide wool for us.
【短语】by the way 顺便说一下 in a way 在某种程度上
in the way of sb. 妨碍某人 on the way to...在去……的途中
in this way 用这种方法
8.keep “使维持（某种状态）”
keep+名词+形容词 Eg. The noise kept him awake.
keep+名词+副词/介词短语Eg. Don’t keep the boy outside/ in the room.
keep +名词+doing Eg. She kept me waiting for half an hour.
9.take in... “接受……，吸收……”
Eg. The kind man would like to take in the poor boy.
Fish take in oxygen through their gills. 鱼用腮吸氧气
10.breathe[i:] v. breath[e] n.
11.make 普通用词，指任何东西的制造或制造过程Eg.He made the desk himself. produce 正式用词，除表示大量生产制造外，还表示创造
Eg. The tree will produce some blossom next year.
12.in fact 实际上，事实上。

用作状语，用于强调或订正前句。

Eg. He doesn’t mind. In fact he is pleased.
13.look ar ound = look round “四下环顾” vt./vi.
Eg. Look around you before crossing the streets. 朝各方向看看
Don’t look around when you study.学习时，别东张西望
14.furniture 不可数名词（集合用法）表示件数时用piece
Eg. We don’t have much furniture.有多少家具
They bought a few pieces of furniture yesterday. 买了几件家具
15.be made of “由……制成”制成品能看出原材料
be made from 制成品看不出原材料
Eg. The shirt is made of silk.
Paper is made from wood.
16.imagine vt. “设想；想象”不可用于进行时；不可跟动词不定式
imagine +名词/动名词/宾语从句
Eg. Can you imagine the life without electricity?
I can’t imagine what he looks like.
17.cut down “把……砍到” Eg. It is not right to cut down the trees.
/doc/3e17016007.html,lions of “无数的，成千上万的”
19.stop sth./doing 停止某事/做某事(停止做正在做的事情)
Eg.Did he stop work/working late last night?
He can’t stop thinking about it.
stop to do 表示中断现在的行动或活动去做另一件事。

不定式to do表示目的
Eg. She stopped reading and closed the book.
I stopped to read the newspaper.
20.pay attention to 注意……
Eg. You must pay attention to this problem.
She asked the boy to pay attention to his spelling.
/doc/3e17016007.html,e...to make = use...for making
Eg. We use wood to make a table.=We use wood for making a table.用木材制作桌子22.be good for “对……有好处，对……有益处”
Eg. Sports will be good for her health.
23.【短语】as a result 结果，因此 according to 根据
the habit of drinking tea 喝茶的习惯 the Tang Dynasty唐朝
重点语法：
现在进行时态
一、现在进行时的用法
1、表示说话时正在进行或发生的动作。

如：
I’m babysitting my younger brother. 我在照看我弟弟。

It’s raining outside. 外面正在下雨。

2、表示现阶段一直在进行或不断重复的动作，但说话时该动作并不一定在进行。

如：He’s watching an interesting TV play these days.
近来，他在看一部很有趣的电视剧。

Are you teaching English in a school? 你在学校教英语吗？
3、表示最近的确定安排，即根据计划或安排在近期内将要发生的动作。

这是表示眼前打算最普通的说法，但一般要与表示将来的时间连用，以避免现在进行时和一般将来时的含义上的混淆。

例如：I’m meeting you at the airport this evening. 今晚，我会到机场接你。

What are you having for dinner? 晚饭吃什么？
4、表示从一个地方到另一个地方位置移动的动词（如go, come, drive, fly, travel, arrive, leave, start, visit，run，return等），以及动词do等的现在进行时形式，可以用来表示没有确定安排的决定或计划。

He’s leaving for Beijing tomorrow. 他明天动身去北京。

What are you doing next Sunday? 下星期天你要干什么？
5、现在进行时和always，usually，all the time等连用时，表示一种经常、反复的动作，且说话人往往带有某种感情色彩（如赞扬、欣赏、厌烦、批评、惊讶、不理解等）。

例如：She’s always helping others. 她总是乐于助人。

（表示赞赏）
You are always talking in class. 你上课老是说话。

（表示批评）
二、现在进行时的谓语部分构成
现在进行时在句式的变化上，都应在助动词be上做文章。

1、肯定式：be（am, is, are）+ Ving(现在分词) 如：
They are having an English class. 他们在上英语课。

2、否定式：be(am, is, are) + not + Ving(现在分词) 如：
They aren’t having an English class. 他们不在上英语课。

3、疑问式：将be的具体形式（即am, is或are）提前到句首。

如：
Are they having an English class？他们在上英语课吗？
助动词变化口诀：变疑问，往前提，句后问号莫丢弃；变否定，更容易，be后not 莫忘记。

三、现在分词的变化规则
1、一般在词尾加-ing（一般-ing）。

例如：going，playing，knowing
2、以不发音的字母e结尾，先去e再加-ing（去哑e）。

例如：making，arriving，coming
3、以重读闭音节结尾，且词尾只有一个辅音字母时，先双写这个辅音字母，再加-ing（重闭单辅先双写）。

例如：running，stopping，preferring
4、以-ie结尾，先将-ie改成y，再加-ing。

例如：tying，dying, lying
口诀：现在进行ing,以e 结尾要去e，除去几个特殊词，系住tie-tying死去die-dying要躺下lie-lying，直接ie变成y。

四、现在进行时态的常见提示语
1、在汉语中，通常有“在，正在”等提示词。

如：
我在做作业。

I am doing my homework.
2、在英语中，最常见的提示词有now，look，listen以及at the moment（此时此刻）等。

如：
Look，they are playing football. 瞧！他们在踢足球。

五、运用现在进行时常见的几个错误
1、把动词变成现在分词形式易出错。

例：
（1）误：They are swiming (swim) .。