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1、That’s only a small share of the total acreage that could benefit, about half a million acres in all, so it will be vital to prioritize areas at greatest risk of fire or drought.（2019英语二 Text2）
本句主要难点在于双逗号中间的插入语做什么成分，修饰对象是谁，判断错误将导致句意理解偏差。
【断句】标点符号
①That’s only a small share of the total acreage that could benefit, //②about half a million acres in all, //③so it will be vital to prioritize areas at greatest risk of fire or drought.
【主干】①主句
【修饰】②同位语修饰①the total acreage；③结果状语从句修饰①整个句子
【主干】①That’s only a small share of the total acreage that could benefit,
主干：主语that（代词）；系动词is；表语a small share（名词短语）
修饰：
定语of the total acreage（介词短语）修饰表语；
定语从句that could benefit修饰acreage。其中，引导词that在定从中充当主语。
【修饰】
②about half a million acres in all, 
名词短语，作同位语，解释说明①的the total acreage，和定从that could benefit修饰的对象相同。
③so it will be vital to prioritize areas at greatest risk of fire or drought.
结果状语从句，修饰主句①
连词so；
主干：形式主语句it will be + a.【vital】+to do sth。真正主语是to prioritize areas
修饰：后置定语at greatest risk（介词短语）修饰areas；后置定语of fire or drought（介词短语）修饰risk
2、The strategy also aims to ensure that carbon in woody material removed from the forests is locked away in the form of solid lumber or burned as biofuel in vehicles that would otherwise run on fossil fuels. （2019英语二 Text2）
本句主要难点在于无明显的断句标志，介词短语、定语和并列多，造成意群切分困难。
【断句】从属连词、并列连词、从句结束
①The strategy also aims to ensure //②that carbon in woody material removed from the forests //③is locked away in the form of solid lumber //④or burned as biofuel in vehicles //⑤that would otherwise run on fossil fuels.
【主干】①主句
【修饰】②宾语从句的主语；③宾语从句的谓语和修饰；④并列结构；⑤定语从句
【主干】①The strategy also aims to ensure
主干：主语The strategy；谓语aims to ensure
修饰：状语also（副词）修饰谓语
【修饰】宾语从句，跟在动词ensure后，补充说明ensure的具体内容
②that carbon in woody material removed from the forests ③is locked away in the form of solid lumber //④or burned as biofuel in vehicles
从属连词that，在从句中不作成分
主干：主语carbon；谓语is locked away和 burned并列（并列连词or）
修饰：定语in woody material（介词短语）修饰主语carbon，定语removed from the forests（v-ed短语）修饰woody material；状语in the form of solid lumber（介词短语）修饰谓语is locked away；状语as biofuel（介词短语）修饰谓语burned；定语in vehicles（介词短语）修饰biofuel
【修饰】定语从句修饰vehicles
⑤that would otherwise run on fossil fuels.
从属连词that，在从句中充当主语；谓语would run on；宾语fossil fuels；状语otherwise（副词）修饰谓语would run on

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