英语必修三第四单元？四种非谓语动词：动词不定式、动名词、现在分词、过去分词。五种简单句：主语+谓语；主语+谓语+宾语；主语+谓语+双宾语；主语+谓语+宾语+宾补；主语+系动词+表语。六种复合句：定语从句、状语从句、四种名词性从句（主语从句、宾语从句、表语从句、同位语从句）。强调句、倒装、省略、虚拟语气、情态动词、那么，英语必修三第四单元？一起来了解一下吧。
Shanghai, situated in the east of China, facing the East Sea on the east, is the largest city of China.
Shanghai is an international metropolis, and also one of the most prosperous cities of the world. Shanghai has many historic sites.
Oriental Pearl TV Tower, the famous symbol of Shanghai, is located in the Pudong Park, which is visited by millions of tourists every year.
Shanghai is also famous for some architecture, such as Shanghai World Expo Garden. Shanghai is also the seat of many international companies.
翻译
上海位于中国东部，东临东海，是中国最大的城市。
http://wenku.baidu.com/view/78506b23af45b307e871973f.html自己去下载
In spite of the rapid growth of economy and technology, our environment has been seriously polluted. It is mainly because there has been a vast amount of trash. The reasons why we have more and more trash are as follows. First, the number of people who produce trash is on the increase. Second, we do not have enough space to have garbage dumped. Third, a lot of rubbish which can be reused than thrown away by people.
Here are several ways we can use to help decrease the amount of trash. First, we should get the public re-educated and let them know the fact that trash pollutes our environment and is harmful to our health. Second, we suggest our government enact strict laws to crack down upon people who litter garbage here and there. Third, we can call on our neighbors to reuse as many things as they have used as possible. Thus, we can have a cleaner environment to live in.
地球上生命的起源
没有人确切知道地球是怎样开始形成的，因为在很早很早以前地球就形成了。然而，一种普遍为人们所接受的理论是；宇宙起源于一次大爆炸，这次大爆炸讲物质投射到四面八方。然后，原子形成并结合成恒星和其他天体。
大爆炸后好几十亿年过去了，但地球还只是一团尘埃。随后他会变成什么没人能知道，知道38-35亿年钱，这团尘埃才慢慢形成一个固体的球状物。地球开始变得激烈动荡，不知道这个固体形状是否会继续存在下去。它猛烈的爆炸喷出了烈火与岩石。最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。更为重要的是，地球冷却了下来，地球的表面就开始出现了水。
在火星这些其他行星上都出现了水，但和地球不同的是，遮羞水后来都消失了。水会对生命的发展起关键作用，这一点在当时并不明显。很多科学家相信，由于地球上长期有水存在，它使得地球得意把有害气体和酸性物质溶解在海洋里。这就产生了一系列的反应，使得生命就有可能发展下去。
好几百万年以后，水的表面开始出现了极小的植物。他们繁殖起来就使得早期的海洋充满了氧气，这为早期的贝类及其他各种鱼类的发育进一步创造条件。接着，绿色植物开始出现在陆地上。随后，陆地上出现了动物，其中有一些是昆虫，另外一些叫两栖动物，他们既能在陆上生活，也能在海里生存。
HOW LIFE BEGAN ON THE EARTH
No one knows exactly how the earth began, as it happened so long ago. However, according to a widely accepted theory, the universe began with a "Big Bang" that threw matter in all directions.After that, atoms began to form and combine to create stars and other bodies.
For several billion years after the "Big Bang", the earth was still just a cloud of dust. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when
the dust settled into a solid globe. The earth became so violent that it was not clear whether the shape would last or not. It exploded loudly with fire and rock. They were in
time to produce carbon, nitrogen, water vapour and other gases, which were to make the earth's atmosphere. What is even more important is that as the earth cooled down, water
began to appear on its surface.
Water had also appeared on other planets like Mars but, unlike the earth, it had disappeared later. It was not immediately obvious that water was to be fundamental to the development of life. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction, which made it possible for life to develop.
Many millions of years later, the first extremely small plants began to appear on the surface of the water. They multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish. Next, green plants began to grow on land. They were followed in time by land animals. Some were insects. Others, called amphibians, were able to live on land as well as in the water. Later when the plants grew into forests, reptiles appeared for the first time. They produced young enerally by laying eggs. After that, some huge animals, called dinosaurs, developed. They laid eggs too and existed on the earth for more than 140 million years. However,
65 million years ago the age of the dinosaurs ended. Why they suddenly disappeared still remains a mystery. This disappearance made possible the rise of mammals on the earth. These animals were different from all life forms in the past, because they gave birth to young baby animals and produced milk to feed them.
Finally about 2.6 million years ago some small clever animals, now with hands and feet, appeared and spread all over the earth. Thus they have, in their turn, become the most important animals on the planet. But they are not looking after the earth very well. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. As a result of this, many scientists believe the earth may become too hot to live on. So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
以上就是英语必修三第四单元的全部内容，international companies.翻译 上海位于中国东部，东临东海，是中国最大的城市。上海是一座国际大都市，也是世界上最繁荣的城市之一。上海有许多历史古迹。东方明珠电视塔是上海著名的象征，位于浦东公园，每年有数百万游客前来参观。上海的一些建筑也很有名，比如上海世博园。上海也是许多国际公司的所在地。内容来源于互联网，信息真伪需自行辨别。如有侵权请联系删除。
