该段英语如何断句I was preparing myself for a command to report to Mr

该段英语如何断句
I was preparing myself for a command to report to Mr.Fleagle immediately after school for discipline when I saw him lift my paper from his desk and knock for the chass's attention.
请问各位老师、哥哥姐姐叔叔阿姨,这段话要怎么断句比较好啊?
比如这里 from his desk / and knock for the chass's attention 和 from his desk and / knock for the chass's attention 怎样断比较好?
那其他怎么断呢?明天就要口语考试了…………