《2025年优化探究同步导学案英语选择性必修第三册》

1. An expert who has studied polar bears for many years said that from the position of its dead body, the bear appeared to have starved and died.
[句式分析]　　本句为复合句。who has studied... years 是__________从句, 修饰先行词 expert; that 引导的是____________从句, to have starved and died 是动词不定式短语, 作系动词 appeared 的__________。
[自主翻译]　____________________________

答案： 定语 宾语 表语 一位研究北极熊多年的专家说，从它尸体的位置看，这只北极熊似乎是饿死的。 

2. Experts claimed that low sea−ice levels caused by climate change meant the bear could not hunt seals as before, so it had to travel greater distances in order to find food.
[句式分析]　本句为复合句。experts claimed 是__________; that 引导宾语从句, 作 claimed 的宾语; 该宾语从句中的 the bear could not hunt seals as before 也是宾语从句, 作 meant 的宾语; caused by climate change 是过去分词短语作__________, 修饰 low sea−ice levels; so 连接的是________。
[自主翻译]　____________________________

答案： 主句 后置定语 并列句 专家称，气候变化导致的低海冰水平意味着这只北极熊无法像以前那样捕猎海豹，所以它不得不长途跋涉去觅食。 

3. There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives.
[句式分析]　本句为复合句。there is strong and comprehensive evidence 是__________; that 引导________从句; not only... but also... 意为“不但……而且……”, 在此处连接两个现在分词短语作__________。
[自主翻译]　____________________________

答案： 主句 同位语 结果状语 有充分和全面的证据表明，气温的上升已导致世界范围内极端天气和自然灾害的增加，不仅造成严重的破坏，而且是以人类的生命为代价的。 

4. Climate scientists have warned that if we do not take appropriate actions, this warming trend will probably continue and there will be a higher price to pay.
[句式分析]　　本句为复合句。climate scientists have warned 是__________; that 引导________从句; 在该从句中, if 引导________从句。
[自主翻译]　____________________________

答案： 主句 宾语 条件状语 气候科学家警告说，如果我们不采取适当的行动，这种变暖的趋势可能会继续下去，我们将付出更高的代价。 

5. It is our responsibility to seize every opportunity to educate everyone about global warming, along with its causes and impacts, because this is the most serious issue affecting all of us on this planet.
[句式分析]　　本句为复合句。because 引导__________从句; it 是__________, 真正的主语是________________________; affecting all of us on this planet 是现在分词短语作__________”修饰__________。
[自主翻译]　____________________________

答案： 原因状语 形式主语 to seize every opportunity... 后置定语 issue 抓住每个机会来教育大家了解全球变暖及其原因和影响的知识是我们的责任，因为这是影响地球上所有人的最严重的问题。