定语从句的语法分析!!!

划括号为定语从句
IS this factory（_______ the foreign visitors visited last week?）
这句 先行词 factory 由于从句中visited是及物动词 后面需要跟宾语 所以关系代词代替先行词在从句中担任的是visited的宾语 可以省略不填，也可以填that/which
本句定语从句主语the foreign visitors 谓语visited 时间状语last week

Great changees have taken place since then in Great changees have taken place since then in the factory （______we are working.)
这句 从句中 work是不及物动词，后面不需宾语，只能跟状语。所以关系副词代替先行词the factory 在从句中担任的是地点状语 填 where
本句主语we 谓语are working

I can never forget the day( ____we worked together )and the day (_____we spent togeher)
本句第一个定语从句 同上个，work是不及物动词，关系副词代替先行词在从句中担任时间状语，所以填when
主语we 谓语 worked
第二个定语从句中 spend是及物动词，所以关系代词代替先行词在从句中做宾语。可以省略不填，也可以填that/which
主语we 谓语spent