Technology. Is it part of our lives? <br />
Cellphones<br />
Look at your text on page 26<br />What tense is the verb in each sentence in italic?<br />Present perfect<br />Is the acti...
Present Perfect <br />We use it to talk about actions or states that began in the past and are continuing now. <br />
Can you give me an example?<br />
Difference between simple past and present perfect<br />Do not use the present perfect when you want to talk about a finis...
He has failed his driving test again. (This is new information)<br /> He failed his exam two times last year (This is old ...
Let’s see if you understand the difference<br />http://www.eflnet.com/grammar/presperf1.php<br />http://esl.about.com/libr...
In present perfect we can use: since / for<br />for + period<br />A period is a duration of time, for example: <br />   5 ...
Do we use since or for with these time expressions? <br />Christmas <br />Last night<br />The last thirty minutes<br />200...
Let’s play in teams<br />Thanksgiving <br />Three years<br />Last summer<br />30 years <br />The last twenty minutes<br />...
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Technology

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Technology

  1. 1. Technology. Is it part of our lives? <br />
  2. 2. Cellphones<br />
  3. 3. Look at your text on page 26<br />What tense is the verb in each sentence in italic?<br />Present perfect<br />Is the action or situation in each sentence finished?<br />No<br />Which sentence focuses on a situation up to now?<br />Cellphones have been around<br />
  4. 4. Present Perfect <br />We use it to talk about actions or states that began in the past and are continuing now. <br />
  5. 5. Can you give me an example?<br />
  6. 6. Difference between simple past and present perfect<br />Do not use the present perfect when you want to talk about a finished time in the past like yesterday or three days ago. Use the past simple instead.<br />The present perfect is generally used when we are giving recent news, and there is a connection with the present. On the contrary, we use the simple past to give older information: we are only talking about the past.<br />
  7. 7. He has failed his driving test again. (This is new information)<br /> He failed his exam two times last year (This is old information)   <br />I have been ill all the week. (There is a connection with the present)<br />I was very ill last summer. I had 'flu. (No connection with the present)<br />
  8. 8. Let’s see if you understand the difference<br />http://www.eflnet.com/grammar/presperf1.php<br />http://esl.about.com/library/quiz/bl_pastorperfect1.htm?lastQuestion=0&answers=0&submit=Next+Question+%3E%3E&ccount=0<br />
  9. 9. In present perfect we can use: since / for<br />for + period<br />A period is a duration of time, for example: <br /> 5 minutes, 2 weeks, 6 years. For means "from the beginning of the period until the end of the period." For can be used with all tenses.<br />since + point<br />A point is a precise moment in time, for example: 9 o'clock, 1st January, Monday. Since means "from a point in the past until now." Since is normally used with perfect tenses.<br />
  10. 10.
  11. 11. Do we use since or for with these time expressions? <br />Christmas <br />Last night<br />The last thirty minutes<br />2009<br />Three years<br />This evening<br />My last birthday<br />
  12. 12. Let’s play in teams<br />Thanksgiving <br />Three years<br />Last summer<br />30 years <br />The last twenty minutes<br />This afternoon<br />My last birthday<br />1989<br />
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