英语语法答:关键词:yesterday,yesterday morning等 ,last week, last year, at the end of last term, 一段时间+ago如:ten years ago, five hours ago, on January 1st,2004, in the 1980s等. Just now,in the old days, long ago, a moment ago等. 过去进行时: 句子结构: 肯定句 主语+was/were+动词的现在分...