各种时态的标志性短语和单词答:should/would+动词原形(should第一人称would第二三人称)5.现在进行时:表示正在进行的词语 6.过去进行时:at that time,then,this time yesterday(last week),at 10o'clock last night 7.现在完成时:since,for how long,today,this year(month),lately,recently,so far,up to now,till(until)...