青少版新概念3AUnit4课件PPT课件

1、 准时准时美国是克莱尔的祖国。美国是克莱尔的祖国。123456 农贸市场农贸市场他们要去美国呆两个月。他们要去美国呆两个月。一个漫长的早晨一个漫长的早晨我们要烧壶水，喝杯美味的茶！我们要烧壶水，喝杯美味的茶！DictationDictation第1页/共11页Robert: Whats this, Dad?William: Its an Apple 2. Its a very early computer. In fact (事实上), its the first Personal Computer,ever(曾今). It came onto the market（面世）in 1977. W

2、here did you find it?Personal Computer = PC 个人电脑the first 第一代第一代come onto the market上市；在市场上出售第2页/共11页Robert: Mum found it in a box in the attic.William: Oh, then its mine! Its been there for years. In fact, its been there since we moved into this house! find的过去式的过去式foundmine = my computerIts been =

3、it has been 现在完成时 have/has + 动词过去分词第3页/共11页Robert: Does it still work?William: I dont know Ah, there you are! Can you hear the hard disk?can 是情态动词，表示能够，有能力做某事can + 动词的原形变一般疑问句时将can提前至句首第4页/共11页Robert: Is that noise （噪音） the hard disk? It sounds like a lawnmower ! William: It is noisy （吵闹的，嘈杂的）! It h

4、asnt been out of its box for twenty years!noise 名词噪音noisy 形容词有噪声的for + 时间段第5页/共11页Robert: What can you do with it? William: Good question! Its just a museum piece , really. Its only got five Megabytes hard disk space.Robert: Five Megabytes! Thats nothing! （太微不足道了）has got 有第6页/共11页William: I know. It

5、 was already a museum piece when I bought it, and that was a long time ago. Maybe Im a museum piece now, too!过去式is was buy bought a long time ago 很久以前 （过去时间，用过去时）第7页/共11页现在完成时： 表示动词发生在过去，持续到现在或对现在产生影响，后接表示延续性的时间状语 have/has + 动词过去分词 如： for+ 时间段 since+ 时间点 I have been to America since d 1998. Jack has got the car for d five years. 第8页/共11页six month three years Sundayten o clock last weekend a long time1996January for forsincesince第9页/共11页Grammar 语法语法 has/have been + + 已经在已经在(某地某地)待了多久待了多久 / 从从.开始一直在开始一直在(某地某地)for + 时间段时间段since + 时间点时间点has/have gone to + 地点地点 + 已经去了已经去了(某地某地)多久多久