has anyone ever been lost here before?帮我解析这句话意思,还有用了什么知识点?

问题描述:

has anyone ever been lost here before?帮我解析这句话意思,还有用了什么知识点?

曾经有人在这里迷路过吗?
知识点有:
1.时态:现在完成时:have been + 过去分词
2.单数第三人称形式:变have为has,因为anyone为单数第三人称主语.