an hour ago是现在完成时的标志词吗 the film started an hour ...

\u73b0\u5728\u5b8c\u6210\u65f6\u65f6\u95f4\u8bcd\u540e\u9762\u6709ago\u662f\u4e0d\u662f\u90fd\u8981\u7528for

1. ago\u8868\u793a\u201c...\u4e4b\u524d\u201d\uff0c\u662f\u8fc7\u53bb\u65f6\u7684\u6807\u5fd7\u3002before\u53ef\u4e0e\u8fc7\u53bb\u5b8c\u6210\u65f6\u8fde\u7528\u3002
2. before \u53ef\u63a5.../\u53ef\u4e0d\u63a5...\uff0cago\u4e0d\u80fd\u63a5...\uff08\u65f6\u95f4\u6bb5+ ago\uff09
3. before\u540e\u63a5\u65f6\u95f4\u70b9\uff0c\u53ef\u7528\u4e8e\u4efb\u4f55\u65f6\u6001\uff1b before\u53ef\u5355\u72ec\u4f7f\u7528\uff0c\u7f6e\u4e8e\u53e5\u5c3e.
ago \u7528\u4e8e\u8fc7\u53bb\u65f6\u6001,\u82e5\u4ee5\u201csince three year ago"\u8fd9\u79cd\u5f62\u5f0f\u51fa\u73b0\uff0c\u5219\u4e0d\u7136\uff0c\u5fc5\u987b\u7528\u5b8c\u6210\u65f6\u3002

The film has been on for an hour.be+adj./prep.\u8868\u793a\u5ef6\u7eed\u6027

是一般过去时的标志词，用于现在完成时用since an hour ago

扩展阅读：half an hour ago ... 男生用agoni什么意思 ... hour ago 中文翻译 ... an hour later ... go home回家游戏下载 ... other 中文翻译 ... ten minutes ago ... the other day ... one hour ago ...