Three years ago与Before three years的区别是什么?

请教three years later与three years ago的区别? Three years ago与Before three years的区别是什么? three years ago作文 Three years ago与Before three years的区别是什么?3Q three years ago 标志什么时态 one week of three years ago 对不对? Three years ago,we love go where () jim ()(study) three years ago? Marry was a teacher three years ago.对three years ago 提问怎么写 I started learing English three years ago.(对three years ago提问) about English grammar ,例句three years ago 中的ago是修饰three years he worked here three years ago用since three years ago改写句子 My uncle lived in America three years ago.就划线提问.提问（three years ago） I have known sandy since three years ago以 since three years ago ,提问 (we lives in shanghai) three years ago.( )three years ago?对括号部分提问 It was three years ago that he joined the army与It is three years since he joined the army翻译及区 it was i met miss white in hangzhou A:three years before B:three years ago that C:three years whenD:three years ago since 该写句子 l got know Peter three years ago.l _____ _____Peter ______three years ago