Unit 1 The Changing World Topic 3 The world has changed for the better . Section A,,,Review,Present perfect,现在完成时： 1、肯定句：have/has+过去分词+其他. 2、否定句：have/has+not+过去分词+其他. 3、一般疑问句：Have/Has+主语+过去分词+其他？ 肯定回答：Yes，l have. 否定回答： No，l have not. 4、特殊疑问句： 特殊疑问词+Have/Has+主语+过去分词+其他？ 5、 have/has+been+to 去过. have/has+gone+to 已经去了.,You have been in New York for a long time.,,for a long time,came to New York,,sb. have/ has been in/at. 某人持续待在某地……,e.g. I have been in the new school for a week.,,for a week,last week,,,for + 时间段,., but the city has improved a lot since I came here a few years ago.,since I came here a few years ago,came here,,,since +从句（从句谓语动词用过去式）,e.g. He has waited for Tom since two hours ago.,since two hours ago,8:00,,,since + 时间段+ago,10:00,e.g. She works in the school since 1995.,since 1995,lived,,,since +时间点,I have worked in the school for three years . I have worked in the school since three years ago . I have worked in the school since 2011. I have worked here since I came to the school .,for+时间段,since+时间段+ago,since+时间点,since+从句,3 Look carefully and think about the differences between since and for . Then complete the sentences with since or for and listen and check.,1.I have lived in Beijing ______ three years. ______2011. 2. He has waited for Tom ______ two hours ago. ______ two hours. 3. We have learned chemistry ___ one month. ____ the new term began.,for,for,for,since,since,since,,n.化学,n.学期,Who can describe our town?,In the past,Nowadays,,,New York,What took place in New York?,1b Listen to 1a and tick what was mentioned about New York.,,,,,,,,1a Listen , look and say,,2 Listen to the passage and fill in the blanks with the correct forms of the given words or phrases .,Broadway is a street in New York . It has been there____ 1811. It ________ be dirty. But it ____________ since the 1920s. The area near Times Square is the home of Broadway theaters . There have been many famous ______ along the street for many years . A lot of artists perform plays , concerts and operas there . Every year millions of visitors come to enjoy the ________ music and dance on Broadway . ______________ , Broadway stands for the American theatre industry .,since,used to,theaters,wonderful,As a matter of fact,has improved,n.艺术家,n.参观者,n.产业，工业,theater used to improve wonderful as a matter of fact since,,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.艺术家,n.产业，工业,n.产业，工业,n.参观者,n.参观者,4 Work in groups and talk about the place you live. Compare today’s situation with that of the past. The following dialogs may help you.,A:I have been in … for /since … B: How do you like living there ? A: It is … / Very good. /I really… B: Was the local traffic terrible /good/…? A: Yes./No, it was … / used to be … in the past, and now it is … B: …,Homework,2. Make five sentences , using for and since.,1. Read 1a aloud.,4. Preview Section B.,3. Finish Section A in your homework.,过去分词之部分不规则动词： AAA型 cut cut cut put put put shut shut shut AAB型 ABA型 beat beat beaten become became become ABB型 bring brought brought ABC型 begin began begun fly flew flown,millions of 用法： 在英语中hundred , thousand , million , billion等词，当其前面有数词时，它们不加 “s”使用，其后也不用介词of .直接跟可数名词的复数形式。
如：five million people 五百万人 当表达不确定数字时，在它们后面加上 “s”再加介词of使用后接可数名词的复数形式，表示 “数百” “数千” “数百万” “数十亿”如： millions of people 数百万人,,。