精选优质文档-倾情为你奉上现在完成进行时?1. 现在完成进行时的构成形式：have(has)+been+现在分词，以work为例： 肯定式： I/You/We have / He/She/It/has been working. 否定式： I/You/We have /He/She/It/has not been working. 疑问式： have I/You/We /Has He/She/It/been working? 2. 用法：a. 现在完成进行时表示从过去某一时间开始一直延续到现在的动作。现在这个动作可能刚刚终止，也可能仍在进行，强调持续性。 I have been sitting here all afternoon. 我在这儿坐了一下午了。 How long has it been raining? 雨下了多久了? She has been sleeping for two hours.她到现在已经睡了两个小时了。I have been studying Chinese for nine years.到现在我已经学习九
