高中英语学习材料
madeofjingetieji
Unit 4 Wildlife protection语言点
编稿：张桂琴
目标认知
重点词汇:
mercy，affect，decrease，loss，reserve，hunt ，contain，certain，appreciate，succeed 重点短语:
die out，protect...from...，pay attention to，in danger
重点句型:
1.“主语+be+形容词+to do”结构。
2. It will be long before…+从句
知识讲解
重点词汇
【高清课堂：词语精讲】
mercy
【原句回放】Farmers hunted us without mercy. 农民们毫不留情的猎杀我们
【点拨】1. mercy ( cn ./un.) 仁慈；宽容；怜悯
They showed mercy to their enemies.
His death was a mercy. The ship was at the mercy of the storm.
Mercy (on us)! What a noise! mercy killing
2. Adj. merciful 仁慈的，宽容的。
She was merciful to the prisoners.
This judge is merciless towards anyone found guilty of murder.
3. Adv. mercifully
The play was very bad, but mercifully it was also short!
【拓展】
at the mercy of sb. /sth. 任……处置；对……无能为力；任由摆布
throw oneself on sb’s mercy 指望某人能宽容
without mercy 残忍地
affect
【原句回放】It contains a powerful drug which affects mosquitoes.
它含有一种影响蚊子的强效药物
【点拨】affect (Vt.) 影响；使感动。
The change in climate may affect your health.
Their opinion will not affect my decision.
Cancer had affected his lungs.
We were deeply affected by the news of her death.
She affected a foreign accent.
辨析：
affect, effect, affection
Alcohol affects drivers' concentration.
Alcohol has a very bad effect on drivers.
He felt great affection for his sister.
Africa has always had a special place in my affections.
【拓展】
Have/produce an effect on 对……有影响
come into effect 生效；实施
be of no effect 无效的；无用的
decrease
【原句回放】If their habitat is threatened or they cannot find enough food，their numbers may decrease．如果它们的栖息地受到威胁或它们不能找到足够的食物，它们的数量就会减少。【点拨】decrease v. & n.
(1)vi. & vt.降低，减少，使(变小)
[搭配]
decrease
in 在……方面减少
from 在……基础上减少
to 减少到……
by 减少了……
The new unemployment figures have decreased from last month．
新的失业人数比上个月有所减少。
The newspaper has decreased in size，but not in quality．
这份报纸虽然版面减少了，但质量并未降低。
The member8 decreased to three hundred．会员减少至300人。
The members decreased by three hundred．会员减少了300人。
(2)n.减少，减少的数量
There has been a steady decrease in population in this city．
这个城市的人口在不断地减少。
【拓展】
on the decrease 在减少
[特别提示]
decrease v.减少
[近]reduce v.减少
[反]increase v.增加
loss
【原句回放】loss of bamboo growing areas 竹子生长地的丧失
【点拨】loss n.
(1)[U]损失；遗失；丧失
Did you report the loss of your jewellery to the police?
你有没有把你丢失珠宝的事告诉警方?
