非限定定语从句修饰的是整句话还是前面的名词

Now the nation’s top patent court appears completely ready to scale back on business-method patents, which have been controversial ever since they were first authorized 10 years ago.

请问老师,which 这个是非限定定语从句,他修饰的不应该是前面整句话吗?为什么翻译答案给的是修饰patents这个名词呢? to scale back 在这里是做补语还是状语呢?怎么区分to do是做补语还是状语呢?

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最佳答案 2022-04-19 19:00

which have...告诉你which的先行词为复数名词。which的先行词如果是整句内容,谓语动词必须用单数形式的。要学会辨识这些线索。

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