《哈利波特》原版中的一句话,

题目

《哈利波特》原版中的一句话,
It was on his way back past them,clutching a large doughnut in a bag,that he caught a few words of what they were saying.请问on his way back past 有涉及到什么语法和词组吗?

答案

It was on his way back past them,clutching a large doughnut in a bag,that he caught a few words of what they were saying.
归途中赶过他们时,他手中紧握袋中一个大甜甜圈,听到了他们说的几句话.
在on his way back past them :归途中赶过们时.
doughnut :甜甜圈