Presentation on theme: "Present Perfect: Since and For Bill Gates and Microsoft 6 Focus on Grammar 3 Part IV, Unit 16 By Ruth Luman, Gabriele Steiner, and BJ Wells Copyright."— Presentation transcript:
Who Is Bill Gates? Bill Gates is one of the richest and most successful business executives in the world. Millions of people have used his computer programs for the past three decades. Bill Gates has always loved working with computers. In fact, he has programmed computers since his early teens. He has been the CEO of Microsoft Corporation since Since then, Bill Gates has written several books and has given billions of dollars to schools. For the last several years, he and his wife Melinda have donated a substanial amount of money to organizations working in global health.
Form 1 The present perfect is formed with: has been Bill Gates has been the CEO since have used Many people have used Microsofts programs. + form of have past participle
Form 2 regularirregular Past participles can be regular or irregular. loved Gates has always loved working with computers. The regular form of the past participle is base form of verb + -d or -ed. The regular form of the past participle is base form of verb + -d or -ed.
has been Gates has been the CEO since have given He and his wife have given lots of money to schools. Form 3 There are many irregular past participles. There are many irregular past participles. Past participles can be regular or irregular.
Form 4 common irregular past participles Note these common irregular past participles. write – written give – given be – been see – seen read – read do – done
Bill Gates has been CEO of Microsoft since Present Perfect Use the present perfect to talk about something that began in the past and continues into the present (and may continue into the future). future 1975 past now since has been CEO
Bill Gates has written several books since Using Since 1 Use the present perfect with since + point in time to show when something started. future 1975 past now since has written several books
Gates has programmed computers since he was 13 years old. Using Since 2 Since Since can also introduce a time clause. future age 13 past now since he was 13 years old. has programmed computers time clause time clause
Change the sentences to present perfect. Add the since phrase in parentheses and delete any past tense time phrases. Maria was in the garden yesterday. since (since 9 a.m.) Practice 1 Maria has been in the garden since 9 a.m. since 1975) 1. Bill Gates wrote many s yesterday. (since 1975) since 1990) 2. They gave a lot of books to schools last year. (since 1990) since I came home) 3. I saw many friends last weekend. (since I came home) since last August) 4. My sister read many articles last night. (since last August) since 2003) 5. My friend worked at a pizza place a year ago. (since 2003) Example: Bill Gates has written many s since They have given a lot of books to schools since I have seen many friends since I came home. My sister has read many articles since last August. My friend has worked at a pizza place since 2003.
Millions of people have used Gatess software for the last three decades. Using For Use for + length of time to show how long something has lasted. futurepast now for the last three decades. have used Gatess software for three decades
Since and For sincefor Note the difference between since and for. five oclock yesterday last summer 1996 he was a child since + point in time for + length of time ten minutes two days three decades many years a long time
Complete the sentences with since or for. Bill Gates has been married to Melinda French Gates ___________ Practice 2 1. Computers have been used in schools __________ more than a decade. 2. I have had a computer in my office __________ the mid- 1990s. 3. Many students have worked with computers __________ many years. 4. My computer hasnt given me any problems __________ last year. Example: since for since for since