网友句子的标点抄写有误，导致误读。应为：

She listened，the back door closed；she could hear the fastener of the kitchen window’s click, and the restless pad of his feet going back to try the front door. 

【翻译】她听了听，后门关上了；她还听到了厨房窗户紧固件的咔哒声，还有他那不知疲倦的脚板走了回来去关前门的声音。

【分析】分号连接两个并列分句。

第一个分句：She listened,the back door closed；

根据前面是个逗号，可以判断，the back door closed 是独立主格结构，作“结果状语”。构成：逻辑主语 + 过去分词。

如果加上and连接，则是并列句。但是，这样则失去了听的结果，表达不出应有的意思。

第二个分句：she could hear the fastener of the kitchen window’s click, and the restless pad of his feet going back to try the front door. 

本句难点是：hear + 复合宾语结构。有两个：

hear the fastener click （动+宾+不定式）

hear the restless pad of his feet going back （动+宾+现在分词）

此外， to try the front door 是目的状语。