They have tried to limit such imports in order to protect their m_英语解答

They have tried to limit such imports in order to protect their members' jobs!
句中tried to是什么成份啊?

人气：353 ℃　时间：2020-05-25 19:02:53

解答

have tried 合起来是谓语,have 是现在完成时的标志,tried 是谓语动词,to 引导不定式结构 to limit
全句：他们试图限制这种进口,以保护其成员的工作.