人教版高二英语Writing.pptVIP

Writing Writing tips Tip one If you are describing a process，explain each step in the order it happens. Tell the reader about causes and effects and use words like “first’’ and “then’’ to show the order of the steps. ◆ First… ◆ Second… ◆ Third/ Then… ◆ Last… Tip two If you are writing about something that has several parts, describe each part and explain its function and structure. The following questions may help: ◆ What is it? ◆ How many parts is it made up of? ◆ What’s the structure of each part? ◆ How does it work? Writing preparation Because the ice has a lower density than water. 1. Why does an ice cube float? 2. What will happen to a piece of metal if you put it in water? It sinks to the bottom of water. 3. Why do so many species live in estuaries? Estuaries are good places where fresh and salt water get mixed, which creates a unique environment filled with life of all kinds. 4. Why have so many cities been built by estuaries? Estuaries have a unique environment, which is created by the mixing of fresh and salt water filled with life of all kinds — a transition zone between the land and sea. Estuaries are the homes of thousands of animals and plants, and seventy-five percent of fish are caught in estuaries. They provide so many resources for living beings to live. Sample Why do so many species live in estuaries? Estuaries are great places for nature’s young creatures. Estuaries represent one of the most sensitive and ecologically important habitats on earth. They provide sanctuary for many species. Here, animals can enjoy all the benefits of the oceans, without having to face many of its dangers. At the river’s mouth, fresh water flows into the sea. The sea also surges into the river, and salt water mixes with fresh water. Tides provide energy for the ecosystems, but estuaries are protected from waves and storms by islands, mud or sand. As ri