英语精品教案：大纲版第二册上Unit2 Crossing limits(名师导课)

Reference for Teaching
Ⅰ。

异域风情
Koala
Why did the koala cross the road？To get to less harmful tree leaves on the other side，according to new Australian research.
For years koalas have puzzled scientists by risking their lives to cross busy highways to eat from a particular eucalyptus tree（桉树) while refusing hundreds of other trees of the same species。

It is a new chemical in those particular eucalyptus trees which stop the koalas from eating them.Koalas have a digestive system that lets them not be harmed by the poison in the eucalyptus tree，which could be harmful to humans。

The Guinness Book of Records lists koalas，native to Australia and in danger of extinction,as the world’s most strict eaters.They are known to choose 0.6 kilogram leaves to eat a day from nine kilograms。

A koala’s diet is almost wholly limited to eucalyptus leaves，very low in energy—producing nutrients，but it is the picky（挑剔的）eating habit which is putting the animal at risk。

Since European settlement，about 80 per cent of Australia’s eucalyptus forests have been cleared and most remaining trees are on private land.
The koala’s slow movement also makes it a frequent victim of dogs，cars and bushfires。

The Australian Koala Foundation says that 4000 koalas are killed each year by dogs and traffic。

Koalas now number less
than 100 000 down from millions in the 1920s when they were shot for their fur。

Ⅱ.知识归纳
1.不能用于进行时态和被动语态的动词
英语中有些动词比较特殊，它们不能用于进行时态和被动语态,这样的(短语）动词常见的有：
(1）belong to 属于……
Our success belongs to all the people present.
我们的成功属于在座的每一个人。

（2)meet 遇见；碰到
I met him in the street at eight yesterday morning。

昨天早晨8点钟我在街上碰到了他.
（3）stay，keep，remain等动词
The weather has stayed hot recently.
最近天气一直很热.
After his election to a high officer,he remained modest.
在被选为高级领导干部之后他仍然谦虚。

（4）wash easily（易洗），break easily（易折），write smoothly（写起来流畅)，light easily（易燃)等动副搭配。

This kind of cloth washes easily。

这种布容易洗。

It is very wet，the match does not light easily。

天气很潮湿，火柴不易划着.
（5）stand,lie等静态动词
这些动词表某物位于某处。

There stands a high building over there.
那边矗立着一座高高的楼房。

（6）taste，feel,look，smell，sound等感官动词
This kind of food tastes good。

这种食物尝起来味道很好。

Ice always feels cold to us.
对我们来说冰摸起来总是冷的.
(7)sell well（畅销）,last well（持久)，wash well（耐洗）,write well（写起来流畅）等动副搭配.
This kind of flower sells well。

这种花很畅销.
The pen produced in this factory writes well.
这家工厂生产的钢笔写起来流畅。

(8）weigh 物体所称重量为……
This stone weighs 200 tons。

这块石头重200吨。

但是当weigh表示“称……”时有被动语态。

This stone will be weighed this morning.
今天上午这块石头将被称出重量.
(9）open店铺开门营业
This shop doesn’t open on Sunday.。