He spent all day at his desk.为什么不是on the desk

问题描述:

He spent all day at his desk.为什么不是on the desk

spend ...on 是说把...花在...上,显然他是整天坐在桌子旁做某事,所以on后面应该跟一件可以在桌子旁做的事.如果用on the desk,会被误认为是他花了一天时间(修,此处也可以换其他的动词)桌子,意思就不明确了