问一道英文题目~11Three separate teams of scientist recently claimed

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/14 23:49:28

问一道英文题目~11
Three separate teams of scientist recently claimed to have made a breakthrough ( involving)stem-cell research.
为什么括号里词不摁扣仪用 involved?理由?
忘记说了```请翻译下``谢谢~

这里的语法现象是分词作伴随状语
鉴别它究竟是该用现在分词还是过去分词的方法是看名次之间的关系
例如这一句
a breakthrough involves stem-cell research
它们之间的关系显然是主动的,所以应当用现在分词
三个独立的科学家团队最近宣称已经获得了包括干细胞研究在内的一次突破性的进展.

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