Present Perfect: since and for Exercise 1: Decide if you need for and since with this time expressions.last weekend10 secondsChristmas Evea decadeI finished schoolI met youfifteen yearsAugustten centuriesthe 90s.thenthe accidenta long timeI was younghe bought this cara couple of daysSaturday2 yearsmy birthday7 daysExercise 2: Do we use for or since with the following time references?1. I haven't phoned home Christmas2. Ola has been my best friend we were nine.3. My dad hasn't had a day off 2015.4. I haven't ridden a bikeages!S. We've been here 8 o'clock.6. She hasn't visited her aunt she was nineteen.7. My brother has been in Germany three days now.8. We have studied English 10:409. Our teacher has worked in this school more than ten years.10. My younger sister hasn't eaten meat Easter.Exercise 3: Put the verbs in brackets into the correct Present Perfect form and fill in with forand since1. Michael2. We3.14. Me and my siblings(not, have) a meal(attend) this school(study) English really hard(live) together10 o'clock.2015.2 daysa long time. Я не очень уверена в ответе .​