你分析的很对.倒装语序是——
only 短语 + 助动词 + 主语 + 谓语动词 + 其余部分
例如:
正常语序:He came only yesterday.他昨天才来.
倒装语序:Only yesterday did he come.仅仅是昨天他才来了.
正常语序:She picked up the receiver only when he entered.他刚一进来她就接听了电话.
倒装语序:Only when he entered did she pick up the receiver.她只是在一进来的时候才接听了电话.
所以这个句子不是倒装语序.为了达到层次清晰,具体分析应该是——
1、now 是整个句子的时间状语
2、主语部分:the only exercise a child gets during an eight hour school day 其中
核心词:the only exercise
定语从句:a child gets during an eight hour school day (during an eight hour school day 是从句中的时间状语)
3、谓语部分:is walking to and from his locker.(his locker 是介词 to and from 的宾语)