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课件网) Module 5 Cartoons Unit 3 Language in use Objectives 1. To practice using the present perfect and distinguish the difference of the simple present tense, the simple past tense and the present perfect. 2. To use the key words and expressions in new situations. 3. To finish the module task: Discussing how to write a competition. Look at the following sentences, paying attention to their tenses. 1. He has been popular for over eighty years. 2. Tintin appeared in China in the 1980s. 3. Snoopy lives in his own private world. P38 一般现在时、一般过去时与 现在完成时的区别 1. 一般现在时 (1) 概念：经常、反复发生的动作或行为及现在的某种状况。 (2) 时间状语：always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays… (3) 基本结构：动词原形 （如主语为第三人称单数，动词上要改为第三人称单数形式） (4) 否定形式：am / is / are + not；此时态的谓语动词若为行为动词，则在其前加don’t，如主语为第三人称单数，则用doesn’t，同时还原行为动词。 (5) 一般疑问句：把be动词放于句首；用助动词do提问，如主语为第三人称单数，则用does，同时，还原行为动词。 (6) 例句： It seldom snows here. He is always ready to help others. Action speaks louder than words. 2. 一般过去时 (1) 概念：过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为。 (2) 时间状语：ago, yesterday, the day before yesterday, last week, last (year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc. (3) 基本结构：be动词或行为动词的过去式 (4) 否定形式：was / were + not；在行为动词前加didn’t，同时还原行为动词。 (5) 一般疑问句：was或were放于句首；用助动词do的过去式did 提问，同时还原行为动词。 (6) 例句： She often came to help us in those days. I didn’t know you were so busy. 3. 现在完成时 (1) 概念：过去发生或已经完成的动作对现在造成的影响或结果，或从过去已经开始，持续到现在的动作或状态。 (2) 时间状语：recently, lately, since …, for …, in the past few years, etc. (3) 基本结构：have / has + done (4) 否定形式：have / has + not +done. (5) 一般疑问句：Have / Has +主语+过去分词+其它？ (6) 例句： I’ve written an article. The countryside has changed a lot in the past few years. 一般现在时 现在完成时 一般过去时 一般现在时、一般过去时与 现在完成时在课本中的举例 一般现在时、一般过去时与 现在完成时在课本中的举例 一般现在时 一般过去时 现在完成时 1. 用法不同 A: I eat breakfast every morning. B: I have eaten breakfast this morning. A句表示过去、现在、未来都要发生的事，这件事是一种习惯或反复。 B句是现在完成时，用于发生在过去的事但对现在仍有影响，或过去的行为一直持续到现在。 B句的意思是：我今天早晨吃饭了，表明吃了早饭（可能现在还不饿）。 现在完成时与一般现在时的区别 2. 时间状语不同 一般现在时表示的是当前一段时间持续的动作或者存在的状态，所以在一般现在时中经常会有时间状语every day，on Sundays，often，sometimes等词出现。 现在完成时中会有一些标志性词语：already，yet，ever，just，since+过去的时间点，for+时间段，so far，up to now，till now等。 侧重点不同 现在完成时和一般过去时所表示的动作 ... ...
