请教几个英语定语从句问题!请大侠指教!
请教几个英语定语从句问题!请大侠指教!
1.He is really the director of a local insane asylum,in which the
narrator is a patient.
2.Director Tom presents a chilling vision of life in the
twenty-first century in which the rich live luxuriously in
skyscrapers while the workers toil as slaves below the ground.
3.Ice in the atmosphere and on the ground can assume various forms,
depending on the conditions under which water is converted to its
solid state.
以上这几个句子的意思我都明白,但是就是对他which前面的几个代词不太理解,就想第一句和第二句which前的in,和第三句which前的under到底是怎么来的?这点极其不理解,