Question

过去式的结构

Answer 1

过去式的结构：肯定句：主语＋be动词（was，were）＋其他；否定句：在动词后面加上not；疑问句: Be动词(Was/Were)＋主语＋其他。,(1)肯定句: 主语＋be动词(was，were)＋其他,           ---She was a student o years ago.两年前她是一个学生.,    否定句: 主语＋be not(was not, were not)＋其他,           ---She was not a student o years ago.两年前她不是一个学生.,    疑问句: Be动词(Was/Were)＋主语＋其他,           ---Was she a student o years ago?两年前她是一个学生吗?,(2)肯定句: 主语＋动词的过去式＋其他,           ---She ate three apples yesterday.昨天她吃了三个苹果.,    否定句: 主语＋did not＋动词原型＋其他,           ---She did not eat three apples yesterday.昨天她没吃三个苹果.,    疑问句: Did＋主语＋动词原型＋其他,           ---Did she eat three apples yesterday?昨天她吃了三个苹果吗?,注意:wasn't 是 was not 的缩写n't 是 were not 的缩写't 是did not 的缩写.,常用的时间状语:,yesterday昨天     o days ago,three days ago(两年前,三年前)等等.,long ago很久以前    last + week(year, night, month…)上一周,去年,昨晚,上个月等等., in 1989,in 2008等等.,a moment ago 刚才,just now 刚才.