1、"were"表示过去的状态或存在。
举例："I was at home last night." (昨晚我在家)
2、"were"表示过去的某些情况或假设。
举例： "If I were you, I would take that job." (如果我是你，我会接受那份工作)
3、"were"用于过去进行时，当"were"作为过去进行时的举例："They were playing tennis when I arrived." (我到达时他们正在打网球)
4、"were"还可以用于虚拟语气，在用于虚拟语气都的举例： "I wish I were taller." (我希望我能长高一点)
