The company has done precisely what it had long promised it would not.
请问what引导宾语从句，但是what作什么成分呢?只是引导词吗? 十分感谢！
The company has done precisely what it had long promised it would not (do).
what为融合型关系代词，= the thing which. 在从句中作 would not (do) 的宾语。句末省略了do.
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