in front the building和in front of the building on

in front the building和in front of the building on

in front of the building在建筑物前面（指的是人在建筑物之外）in the front of the building指的是在建筑物里的前面（人在建筑物里）on the frontI met them on the front porch.（在走廊里）我在前面走廊上碰到他们.The newspaper screamed the news on the front page.（在报纸里）那家报纸在头版醒目地登出了这条新闻.at the front（指的是在事物前面,建筑物之外）Who's that boy at the front of the queue?排在队伍前面的那个男孩子是谁?Small porch or set of steps at the front entrance of a house.一所房子的门口前的小门廊或是几级台阶.希望能帮助到您======以下答案可供参考======供参考答案1:黑板在教室前面用the树在教室前面不用the在里面与外面的区别

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