three years ago 标志什么时态

three years ago 标志什么时态 three years ago作文 Mary ____ ____in China since three years ago .填什么 My uncle 什么 it from my gandfather three years ago. 李红 began to collect 填什么 three years ago. 例：three years ago/three years before 如何判别该使用什么时态? three years ago ago修饰什么像three years later.later ago这样的副词修饰的是什么?修饰three years 好像不对,副词修饰不了名词,求ago到底修饰了什么! 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? one week of three years ago 对不对? Three years ago,we love go where () jim ()(study) three years ago? I .[not see]her since she.[leave] Beijng three years ago.的空中应填什么 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）