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英语 关于have与have been

来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/11/06 07:51:49
英语 关于have与have been
句子1 doctor have been instrumental in improving living standards in western society.
句子2 sicial factors have interplayed with one another over the past hundred years and made the middle east what it is today.
请问为什么一个是have 一个是have been?
1) to be instrumental in sth.有助于.= 是 to be 的句型 = 医生有助于.
2）to have interplayed with 相互影响（作用）= to do 的句型 =社会因素相互影响（作用）
英语 关于have与have been 关于英语have been 关于have been的英语 求解! 关于must have been 关于现在完成时have been 关于Have you been have been to与have been in have been in与 have been to have been 与had been 英语Have been 英语:have been 英语中的 have been