1. when game moved out of the lowlands in early spring是时间状语。是when引导的时间状语从句。句子里存在主谓宾结构，game主语，move out of谓语，the lowland是宾语。其中out是副词，修饰谓语动词move。 2. when Fort Vancouver became the headquarters of the Hudson's Bay Company 是时间状语从句，跟前面的Later on in the early years of the nineteenth century是同位语关系，都是表示那个时间点的。when后面，Fort Vancouver主语，b...
