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But it has already sparked significant controversy, with the United States trade representative opening an investigation into whether the tax discriminates against American companies, which in turn could lead to trade sanctions against France. 2020英语一Text4

【主干】

主句 But it has … controversy

with结构作状语 with the United … France

→其中嵌套2个从句

①宾语从句【介宾】 wheter the tax … companies

②定语从句【先行词companies】which in turn… France

【主句】

But it has already sparked significant controversy

主干：it主语，has sparked谓语，controversy宾语

修饰：But连词，already状语修饰谓语，significant定语修饰controversy

【with结构作状语】

with the United States trade representative opening an investigation into whether the tax discriminates against American companies, which in turn could lead to trade sanctions against France.

主干：with+N+ving →with the representative opening an investigation into

修饰：United States &trade两个名词作前置定语修饰representative

【宾语从句】

whether the tax discriminates against American companies

主干：the tax主语，discriminates against谓语，American companies宾语

whether引导词不作成分

【定语从句】

which in turn could lead to trade sanctions against France

主干：which引导词作主语，could lead to谓语，trade sanctions宾语

修饰：in turn副词修饰谓语，against France后置定语修饰trade sanctions