Question

帮忙分析一下句子结构

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 class‟s attention

Answer 1

主句是I was preparing myself for a command to report to Mr. Fleagle immediately after school for discipline
when...引导时间状语从句
在此处 prepare oneself for 是固定搭配 某人为什么做准备
第一个to是给command作解释的介词
第二个to mr Fleagle 是介词加宾语
for discipline 是说明原因 因为惩罚
就是
当我看到他从书桌上举起我的试卷并且敲桌子引起同学们注意的时候
放学以后我正在急着准备一份报告给。。。先生 因为惩罚

Answer 2

1、主句结构和成分：
【I 主句主语】【was preparing 谓语】【myself for a command to report to Mr. Fleagle immediately after school for discipline宾语】【 when I saw him lift my paper from his desk and knock for the class's attention 时间状语从句】
主体句子结构是
【sb be doing sth when sth happened】

2、从句结构和成分：
when 【I从句主语 】【saw 谓语】【him宾语】【 lift my paper from his desk and knock for the class's attention省略不定式符号to的不定式短语，宾补】

祝你开心如意！