I looked at a photograph an hour ago.为什么不用加介词at?为 Looked at a photograph改成一般过去时?
He did so an hour ago \u8bf7\u95ee\u5728\u65f6\u95f4\u524d\u9762\u4e0d\u7528\u52a0\u4ecb\u8bcdat\u5417\uff1f\u4e0d\u7528\uff0c\u8fd9\u91cc\u7684\u65f6\u95f4\u8868\u4fee\u9970\u76f8\u5f53\u4e8e\u4e00\u4e2a\u526f\u8bcd\uff0c\u4e0d\u7528\u52a0at
\u8fd9\u4e2a\u5c31\u662f\u8fc7\u53bb\u65f6\u554a
look at 为固定搭配意思是“看,考虑,着眼于”
an hour是一段时间,并不是时间点,不用加at。
望采纳。
look at sth 固定搭配。an hour ago一个小时前,是过去时间状语。
为什么要加at
扩展阅读:i looked in many shops ... look out ... i looked for my key ... you is pig ... take charge ... im coming ... they want to me ajob ... cloud music to mp3 ... i人和e人测试 ...