Tom's refusing to accept the invitation upset me. to accept和refusing是什么关系?在句子中做什么成分

问题描述:

Tom's refusing to accept the invitation upset me. to accept和refusing是什么关系?在句子中做什么成分

Tom's refusing to accept the invitation 是句子的主语,这里refusing是动名词,Tom's是Tom的,upset才是句子的谓语动词,整句:
Tom的拒绝(我的邀请)让我很伤心.
句子不是很地道,可这样修改:
Tom's refusal to the invitation upset me.这里的to是介词
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