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1、Though often viewed as a problem for western states, the growing frequency of wildfires is a national concern because of its impact on federal tax dollars, says Professor Max Moritz, a specialist in fire ecology and management.（ 2017英语二 阅读Text4 ）
【主干】the growing frequency of wildfires is a national concern
主语the frequency；系动词is；表语a concern
前置定语growing、后置定语of wildfires一起修饰主语；前置定语national修饰表语。
【修饰】
1、让步状语（短语）Though often viewed as a problem for western states修饰主句；
形式：分词短语作状语，“从属连词+ V-ed短语的形式”；
其中包含动词词组view…as，状语省略的主谓是the growing frequency of wildfires is。
2、原因状语（短语）because of its impact on federal tax dollars修饰主句；
3、全部倒装says Professor Max Moritz；
4、同位语a specialist in fire ecology and management 修饰Professor Max Moritz；
其中in fire ecology and management作后置定语修饰a specialist。
2、Over the past decade, the focus has been on climate change – how the warming of the Earth from greehouse gases is leading to conditions that worsen fires.（ 2017英语二 阅读Text4 ）
【主干】the focus has been on climate change 主系表结构。
表语（介词短语形式）on climate change
【修饰】
1、时间状语（介词短语形式）Over the past decade
2、同位语从句how the warming of the Earth from greehouse gases is leading to conditions that worsen fires修饰主句主语focus
→从属连词how作状语，修饰谓语is leading to
→【主干】主语the warming；谓语is leading to；宾语conditions
→【修饰】
1、后置定语of the Earth + from greehouse gases（介词短语形式），修饰主语the warming；
2、定语从句that worsen fires，修饰宾语conditions
3、At the same time, people continue to treat fire as an event that needs to be wholly controlled and unleashed only out of necessity, says Professor Balch at the University of Colorado.（ 2017英语二 阅读Text4 ）
【主干】people continue to treat fire as an event
谓语（词组）continue to treat…as
【修饰】定语从句that needs to be wholly controlled and unleashed only out of necessity，修饰宾语events。
引导词that作主语，谓语并列（情态动词、被动语态）needs to be controlled and unleashed，状语wholly修饰controlled，状语only out of necessity修饰unleashed
【连词】At the same time
【全部倒装】says Professor Balch at the University of Colorado；其中，后置定语at the University of Colorado（介词短语形式），修饰Professor Balch
4、But acknowledging fire’s inevitable presence in human life is an attitude crucial to developing the laws, policies, and practices that make it as safe as possible, she says.（ 2017英语二 阅读Text4 ）
【主干】acknowledging fire’s inevitable presence in human life is an attitude
主语acknowledging fire’s inevitable presence in human life（v-ing短语形式）；其中，后置定语in human life（介词短语形式）修饰presence；系动词is；表语an attitude。
【修饰】
1、后置定语crucial to developing the laws, policies, and practices（形容词短语形式）修饰an attitude。
2、定语从句that make it as safe as possible,修饰the laws, policies, and practices。
从属连词that作主语，谓语make，宾语it，宾补as safe as possible（介词短语形式）
【连词】But
【全部倒装】she says考研实用工具推荐
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