had been 用法.He waved desperately to his companion,who had been water skiing for the last fifteen minutes.who 是引导非限定性定语从句,那么had been 在这里是什么时态?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 00:27:59
xQMN@^ Pw@D~%D Z`%ƾ
T]af2PL02qCRRhDiQs&ILRQ2e))dbdf&ʉ$$L5FI\TTHHJGcusjad O.