Unit 5 Meeting your ancestors Section Ⅲ Grammar-现在完成进行时语法图解探究发现①Well, we've been finding the bones of tigers and bears in the caves, and we think these were their most dangerous enemies.②It has been raining since last week.③He has been writing a novel, which will be finished next month.④He has written a novel, which is being prepared to come out now.⑤I have been visiting my hometown recently, and it impresses me differently each time.⑥I have visited my hometown recently, whose changes have left a deep impression on me.⑦Recently she has always been helping me.⑧Recently she has helped me a lot.[我的发现](1)由句①②③看出现在完成进行时的构成形式为：have/has ＋ been ＋ doing 。(2)比较句③④，现在完成进行时强调动作未完成；而现在完成时强调动作已经结束。(3)比较句⑤⑥，现在完成进行时强调动作的重复，现在完成时可以表示一次性动作。(4)比较句⑦⑧，现在完成进行时表示一种感情色彩；现在完成时则陈述一种事实。一、现在完成进行时1．基本含义：表示一个在过去开始而在最近刚刚结束的动作；表示一个从过去开始但仍在进行的动作；表示一个从过去开始延续到现在，可以包括现在在内的一个阶段内，重复发生的动作，通常表示一种感情色彩(关切、惊异、愤怒、赞许等)。2．基本结构：have/has been doingWe have been waiting for you for half an hour.(动作刚结束)我们一直等了你半个小时。The Chinese have been making paper for two thousand years. (动作还将继续下去)中国有 2 000 年的造纸历史。 I have been learning English since three years ago.(动作还将继续下去)自从三年前以来我一直在学英语。You have been coughing a lot lately. (关切)近来你一直咳嗽。Too much has been happening today. (感慨)今天真是个多事的日子啊。He has always been studying hard. (赞许) 他学习一直很刻苦。[名师点津] 现在完成进行时的特点：(1)兼具现在完成时及现在进行时的特点；(2)可以表示某一动作对现在产生的结果或影响；(3)也可以表示某一动作的延续性、临时性、重复性、生动性及感情色...
