Unit 5 A fine balance 课文解析（Understanding ideas部分）2026-2027学年外研版英语九年级上册

九年级英语上册

Unit 5课文解析

（Understanding ideas部分）

1.How can people influence nature?人类可以如何影响大自然？

【用法讲解】 influence在表示“影响力、势力、权力”时为不可数名词；influence在表示“有影响的人/事物、有权势者”，其复数形式为influences；还可为动词，译为“影响”。

Eg: The weather an influence our mood.

天气可以影响我们的情绪。

His parents have a great influence on his career choice.

他的父母对他的职业选择有很大影响。

The celebrity is a big influence on fashion trends.

这位名人对时尚潮流有很大影响。

【常见搭配】 have an influence on ...对...有影响

Under the influence of...在...的影响上

Influence sb.to do sth.影响某人做某事

Be influenced by...被...影响

People of influence   有权势的人

Eg: The movie has a positive influence on young people.

这部电影对年轻人有积极的影响。

The child’s behavior changed under the influence of his friends.

这个孩子的行为在他朋友的影响下发生了改变。

His example influenced me to work harder.

他的榜样影响我更加努力地工作。

She is influenced by her parents’ values.

她受到父母价值观的影响。

We should seek advice from people of influence.

我们应该向有权势的人征求意见。

【派生词】 influential为形容词，译为“有影响的、有权势的”。

Eg: He is an influential figure in the business world.

他是商界一个有影响的人物。

【即学即用】

1.老师的话对学生未来的选择产生了很大影响。

The teacher’s words _______ _____ ______ ______ _____ the students’ future choices.

答案： had a great influence on

2.When the earth stands still当地球停滞不前

【用法讲解】 still可为副词，译为“仍然、静止地”；still还可为形容词，译为“静止的、不动的”；still还可为动词，译为“（使）静止、平静”；still还可为连词，译为“然而”。

Eg: He is still working on the project.

他仍然在从事这个项目。

The water was still after the storm.

暴风雨过后，水面平静了下来。

She stood there, still as a statue.

她站在那里，一动不动，像座雕像。

The wind stilled.  

风停了。

Still, he managed to finish the race.

然而，他还是设法完成了比赛。

【即学即用】

(  )1.Have the test results arrived _______?

A.yetB.already

C.stillD.ever

答案：1.A

3.Let’s imagine such a world.让我们想象这样一个世界。

【用法讲解】 imagine为动词，译为“想象”，后面可接名词、代词、动名词（doing）、that从句或介词短语。

Eg: Can you imagine Tom cooking dinner for twenty people?

你能想象出汤姆为20个人做饭的样子吗？

I imagine the ship very large.

我想象那船很大。

Imagine yourself sitting on the beach in the sun.

设想你自己正坐在海滩上晒太阳。

【常见搭配】  imagine as...把...当作

Eg:  I had imagined you as a big tall man.

我原猜想你是个身材高大的人。

【派生词】  imagination为名词，译为“想象力”

Eg: His writing lacks imagination.

他的作品缺乏想象。

【即学即用】

(  )1.I can’t imagine _______ like that.I would go crazy.

A.lieB.lying

C.to lieD.lied

答案： B

4.If people are gone, what would happen to the natural world?

如果人们离开了，自然世界会发生什么？

【用法讲解】 happen为动词，译为“发生”；主语常常为事。 注意：happen不能用被动语态。

【常见搭配】 sth.+ happen + 地点/时间“某地/某时发生了某事”

Sth.+ happen to sb. “某人发生了某事”

Sb.+ happen to do sth.“某人碰巧做某事”

happen along偶然遇到

Happen on/upon偶然发现

Whatever happens无论发生什么

Eg: An accident happened in that street.

那条街发生了一起事故。

A car accident happened to him yesterday.

昨天他发生了交通事故。

I happened to meet her in the street.

我碰巧在街上遇见她。

I happened along the bookstore and bought a new book.

我偶然路过书店买了一本新书。

I happened upon a great deal while shopping.

我在购物时偶然发现了一个好交易。

Whatever happens, I will support you.

无论发生什么， 我都会支持你。

【易混辨析】 happen和take place的区别

happen通常用于描述偶然或突发性事件，强调事件的不可预测性和偶然性；

Take place通常用于描述按计划或安排发生的事件，强调事件的计划性和预谋性。

Eg: An accident happened yesterday.

昨天发生了一起事故。

The meeting will take place next Monday.

会议将在下周一举行。

【即学即用】

(  )1.Excuse me, what _______ just now?

A.happened B.to happen

C.is happeningD.did happen

(  )2.An accident _____ in the small town yesterday.

A.take placeB.happened

C.was happenedD.took place

答案： 1. A   2.B

5.It is no surprise that animals soon increase in number.

动物数量很快就会增加。

【用法讲解】

increase作为动词，还可译为“增大、繁殖”；increase还可为名词，译为“增加、增量”。

Eg: The cost of the project has increased dramatically since it began.

该项目自开始以来成本就急剧上升。

Some bacteria can increase rapidly under favourable conditions.

一些细菌在有利条件下能迅速繁殖。

There has been a significant increase in sales this month.

本月销售额有显著增长。

We need to calculate the increase in population over the past decade.

我们需要计算过去十年的人口增长量。

【常见搭配】 increase by...+ 百分比增加了...

Increase to...+ 具体数量增加到...

Eg: The price of the house has increased by 20% this year.

今年房价上涨了20%。

The population of the town has increased to 50,000.

这个城镇的人口增加到了5万。

【派生词】  Increasing为形容词，译为“越来越多的”；

increasingly为副词，译为“日渐增多地”。

Eg: An increasing number of people

越来越多的人

It is becoming increasingly difficult to find a job.

找工作变得越来越难。

Number为名词，译为“号码、数字、数量”；number也可为动词，译为“编号、计算”。

Eg: What’s your number?

你号码是多少？

Number the pages in the book.

给这本书的每一页编号。

Please number the total people.