Unit 3 Part Ⅲ Grammar and usage & Integrated skills-【高考领航】2023-2024学年高中英语选择性必修第二册同步核心辅导与测评（译林版）

Part Ⅲ　Grammar and usage & Integrated skills 第一板块　Grammar—The present perfect continuous tense 观察下列句中加黑的部分，然后完成后面的归纳。 ①(教材原文P30)Geneticists have been trying to identify which genes relate to which diseases，as they believe genome editing is an effective means of disease treatment and prevention. ②(教材原文P31)Despite the public argument over this technology，its possibilities have been creating much excitement throughout the entire medical community and beyond. ③He has been writing a novel，which will be finished next month. ④I have been waiting for this chance ever since my accident，and I'm so grateful for all the new possibilities my robotic hand has opened up. 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. 【自我归纳】 (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④中所使用的两种时态，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．现在完成进行时的构成：助动词have/has＋been＋v.-ing形式。 2．现在完成进行时的用法： (1)表示动作或状态从过去某一时间开始一直持续到说这件事时，动作或状态刚刚结束或还有可能继续下去。这种时态常和all the time，this week，this month，all day，all the morning，these days，recently等时间状语连用，还常与since和for构成的时间状语连用。 The students have been working hard on their lessons and their efforts will be rewarded with success in the end. 学生们一直在努力学习功课，他们的努力最终将会获得成功的回报。 (2)表示一直到说话时为止的一段时间内一再重复的动作。 We've all along been making mistakes like this. 我们一直犯这样的错误。 (3)表示感情色彩。 You know，you really have been making things terribly difficult for him. 你要知道，你也真是太为难他了。 [即学即用1] (1)用所给词的适当形式填空 ①I have been reading (read) Hemingway's Farewell to Arms recently. ②I have been meeting (meet) her at the library.I believe that I will meet her again today. (2)完成句子 ③自三年前以来我一直在学英语。 I have been learning English since three years ago. ④中国已有数千年的造纸历史。 The Chinese have been making paper for thousands years. ⑤今天真是个多事的日子。 Too m