Module 4 A Social Survey-My NeighbourhoodSection Ⅲ Grammar-现在完成时语法图解探究发现①It’s been six years since we last saw each other, you know.②And this is the first time I’ve visited your hometown.③I’ve seen quite a lot of China and I’ve visited some beautiful cities.④But this is one of the most attractive places I’ve been to.⑤They’ve put up a lot of highrise buildings recently.⑥My wife’s just bought a beautiful dress from one of the shops there.⑦Xiao Li has lived in Xiamen all his life.⑧The family have lived in the town for twenty years.⑨Up to now, I’ve understood everything the teacher said.⑩He has gone to the Great Wall.[我的发现](1)现在完成时的构成是：have/has ＋过去分词 。(2)由例句①可知，现在完成时可与 since 引导的时间状语从句连用。(3)由例句⑤⑥⑦⑧⑨可知，现在完成时可与时间状语 recently,_just, all his life, for_twenty_years,_up_to_now 连用。(4) 由 例 句 ④ ⑩ 可 知 ， have/has_been_to 表 示 “ 曾 经 去 过 ( 某 地 )” ；have/has_gone_to 表示“已经去了(某地)，去而未归”。一、现在完成时的基本概念现在完成时表示动作发生在过去，强调过去的动作对现在的影响。现在完成时与现在有关，属于现在时态。二、现在完成时的构成肯定句主语＋have/has＋过去分词．..否定句主语＋have/has not＋过去分词．..疑问句Have/Has＋主语＋过去分词．..？被动句主语＋have/has been＋过去分词．..[即时演练 1] 按要求改写句子They have built another hospital in the area.→They haven ’ t _built another hospital in the area.(否定句)→Have_they_built another hospital in the area？(疑问句) →Another hospital has_been_built by them in the area.(被动句)三、现在完成时的基本用法1．“完成用法”：表示动作在说话时已经完成(可不指出动作发生的确切时间)，但对现在产生某种后果或影响。常与 ever, recently, before, so far, up to now, till now, in the past years, these days 等时间状语连用。Tom has made much progress ...
