划分句子成分(let)(the fresh air )(in).

let 。。。in 1。让…进入；放…出来 2。让……进去,放……近来 VOC结构,即动词+宾语+补语(let) (the fresh air ) (in)谓语 宾语 补语其它例子：When the passenger woke up,he (found)( himslef) (lying in a hospital ward)。动 宾 补当这个乘客醒来时,他发现自己躺在医院的病房里。As time went on,Susan (found)( herself) (in a trap from which she couldn't escape)。动 宾 补随着时间的推移,苏珊发现自己落入了一个无法逃脱的陷阱。