For or Since 1 For or Since For is used for general periods of time - 2 hours, three days, one month.Sinceis used for a specific time - 1998, January, last week, one month ago. Click the answer button to see the correct answer. I have studied computers...... Answer for seven weeks. Answer for a long time. Answer for two days. Answer since I was 10 years old. Answer since a year ago. Answer for a year. Answer for ten days. Answer since 2004. Answer since I came to Tokyo. Answer for 4 hours a day for two years. Answer for three years. Answer since June. Answer since the beginning of the month. Answer for about 45 minutes. Answer since I was in elementary school.
