(共45张PPT)
It is reported that Earth's climate is being changed and human will face global ①_______ in the 21st century.
What is global
warming？ It refers to an average increase in the Earth's
② that, in turn, leads to climate change.
Why is global
warming seen as
a danger, and
how is it relevant
to our lives？ The global average temperature has increased by 1°F over the last 100 years ③ of human activities. If the ④ continues, we are condemning life on Earth and should face terrible climate changes, serious diseases and bad ⑤ on some industries as well as the
⑥ sea levels.
How can we
stop these
disasters from
happening？ ⑦ all over the world have a responsibility to ⑧ the amount of carbon dioxide ⑨ by their countries. Everyone worldwide can play their part by making small
⑩ in the daily life.
“课时跟踪检测”见“Unit 22 课时跟踪检测（一）”
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谢 谢 观 看(共59张PPT)
a number of 表示“许多，大量”，相当于many，修饰可数名词复数形式。作主语时，谓语动词用复数。number前可用large, great, small等修饰，以表示程度
the number of 表示“……的数量”，与复数名词连用作主语时，中心词是number，谓语动词要用单数
“课时跟踪检测”见“Unit 22 课时跟踪检测（二）”
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谢 谢 观 看(共75张PPT)
The last few years have ①______ more environmental disasters and far worse ones may come.
The influence
of natural
disasters ·Reduced rainfall has affected large areas
②________ irrigation canals dry and some nations have already been in ③_____________ over water.
·A volcanic eruption nearly
④_________ the small island of Montserrat.
·Indonesia has had a rough time，
⑤_________ several killer quakes and it is still
⑥__________________ the Asian tsunami.
The
⑦reasons
for natural
disasters ·One answer is ⑧_____________. It is growing at the rate of 10,000 people an hour.
·⑨ ________ that, add global warming.This has mainly caused by huge amounts of carbon dioxide.
·Around ⑩ ____ the world's population lives in cities, causing more damages.
represent 用来表示“代表某人/某个团体/政府等”“某种标志代表什么”“某物(书、雕塑等)表现的是什么”和“把某人/物描绘成什么”
on behalf of 常用作状语，表示“代表/代替某人”
stand for 往往用来表示“(字母、数字、符号等)代表/象征什么”
“课时跟踪检测”见“Unit 22 课时跟踪检测（三）”
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谢 谢 观 看(共28张PPT)
单词 词义 搭配
adopt 采纳；收养；正式通过，批准 adopt a child收养孩子adopt different approaches采取不同的办法
adapt (使)适应，(使)适合；改编；改写 adapt (sb./oneself) to sth. (使某人/自己) 适应某事
(be) adapted from由……改编
(be) adapted for为……改编
“课时跟踪检测”见“Unit 22 课时跟踪检测（四）”
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谢 谢 观 看
consider v若虑；认为
considerate adj.
consideration
considerable adj.
周到的，体贴的
.体谅，考虑
相当大/多的
under consideration
take ..into consideration
在芳虑中
把…考虑在内(共12张PPT)
谢 谢 观 看(共25张PPT)
relieve 着重指减轻或暂时解除(痛苦，负担等)
release 指从根本上免除、解除，还有“发行，发布；释放”的意思
“课时跟踪检测”见“Unit 22 课时跟踪检测（五）”
(单击进入电子文档)
谢 谢 观 看(共44张PPT)
非谓语动词 一般式 完成式
动名词 being done having been done
现在分词 being done having been done
不定式 to be done to have been done
“单元质量检测”见“Unit 22 单元质量检测（一）”
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谢 谢 观 看
1.动词+that
2.动词+sb.+that从句
3.动词+sb.+to do sth.
常见的转述结构
4.动词+to do sth.
5.动词+v.-ing
6.动词+if/whether
7.动词+介词+v.-ing
谓语动词的
各种时态的被动语态
被动语态
主动表示被动
被动
being done
语态
动名词
having been done
being done
非谓语动词
现在分词
的被动语态
having been done
to be done
不定式
to have been done
