7B U n i t3O u r A n i m a l F r i e n d s 重点单词、短语
重点句型
1.I think...are very helpful animals. They help us...
2.Without ..., we cannot...
3.We get ... from...
详细讲解：
in front of 指在某一范围以外的前面，反义词是behind
Tom is just sitting in the front of the car, and her friend Mary is standing in front of the car.
汤姆正坐在汽车的前座，而她的朋友玛丽站在汽车的前面。

3.h ear some noise。

听到响声
noise 指令人不愉快的“噪音”Don’t make so much noise。

sound 指能听到的任何声音
（人、动物、自然界）
At midnight he heard a strange sound。

voice 主要指人的嗓音，说话、唱歌，
也可以指动物的“叫声”Liangying Zhang’s voice is sweet.
in the front of 指在某一范围内部的前面，反义短语是at the back of
7B Unit 4 save the trees.
重点单词
Save 节约，节省pine n.松树discuss v.讨论，谈论Branch n.树枝，分歧root n.根，根源fight v.与···战斗Against 反对，违反example 例子harmful 有害的
gas 气体，毒气produce n.农产品oxygen n.氧气
major 主要的convenient adj.方便的furniture 家具
imagine 想象，想到disease n.疾病dig v.挖
Hole n. 洞carry 拿，搬运container n.容器
必背短语：
take in 吸收come from 来自for example 例如
in fact 实际上，事实上look around 四周环顾(be) made of 由··组成millions of 数以百万的(be) good for 对···有害
仔细讲解：
1.I f I plant this seed in the ground，will it become a pear tree，Hi？（page43）
由if 引导的条件状语从句，表示”如果”,
①如果主句（包括祈使句、含有情态动词can、may、must）用一般现在时，从句也要
用一般现在时；
②主句用过去时，从句也要用过去的某种时态，如果主句是一般将来时态，从句要用
一般现在时表示将来。

2.T hey help fight against pollution.（page44）
Fight vi. 与….斗争，常与介词against 或with 连用。

如：They fought against the enemy fiercely
扩展：fight vt.战斗，反对，可直接跟宾语。

如：They fought their enemies bravely. 他们勇敢杀敌
扩展：against prep. 意为“，违背，违抗；紧靠，防备”。

Be against 反对，be for 赞同如：We take out umbrella just against a rainy day.我们带上雨伞以防雨天。

3.T hey take in harmful gases from the air and produce oxygen for us to breathe.（page45）
①harmful adj. 有害的; harm n. vt. 损害；伤害；危害; harmless adj.无害的，不致伤的.
如：It’s harmful to your eyes to read in the dark. No harm would come to us.
4.A lot of the furniture is made of wood.（page45）
①Furniture 不可数名词，家具。

My piano is made in Beijing. The birthday cake is made by my mother. The table is made of wood. Wine is made from grapes. Grapes are made into wine. The bike is made in China. （记忆顺口溜：物质不变用 of ，物质变化是 from ）
5.I can’t imagine a world without trees.（page45）
6. H
owever, … (page48)
7. he can skate at a very high speed because she practises a lot.
①Practise vt. 训练，练习。

宾语可接名词，代词，动名词。

如：It's very important to practise listening. 练习听力是非常重要的。

②Practise vi. 如：Don' t forget to practise after class. 课后别忘了练习。

③practise 的名词是 practice 不可数名词。

通常指经常性或系统性的重复练习。

Practice makes perfect. 是一句谚语，意思是“熟能生巧”。

8. B ut the speaker did not stop speaking until twenty past twelve.（page52）
Not…..until 意为：直到…..才…..。

主语的动词一般为非延续性动词，它所表示的动作
直到 until 所表示的时间才发生。

如：We won’t see any flowers until May.
Unitil 连词，意为:直到…..时。

用于肯定句，主句的动词一般为延续性动词。

如：He waits the children are asleep. I shall stay here until twelve o’clock.
10. 辨析Carry，take，bring
It covers five and a half million square kilometers of the Amazon Basin and spreads across nine countries.（page54）
（1）①Cover v. 覆盖，遮盖；
cove…with 用···把··盖上；be covered with…被….覆盖着。

如：The road is usually covered with snow in winter
②Cover 可数名词，意为：覆盖物，盖子，封面
如：The new book needs a new cover.
12.Many living things lose their homes because of deforestation.（page54）
13.As a result, the number of kinds of animals, birds, insects and trees in the world is
14.Tea is the most popular drink in the world besides water.(page55)
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At the end, Xiao Bian gives you a passage. Minand once said, "people who learn to learn are very happy people.". In every wonderful life, learning is an eternal theme. As a professional clerical and teaching position, I understand the importance of continuous learning, "life is diligent, nothing can be gained", only continuous learning can achieve better self. Only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. This document is also edited by my studio professionals, there may be errors in the document, if there are errors, please correct, thank you!。