For and Since for Time
For and Since for Time We often use for and since when talking about time. for + period A period is a duration of time, for example: 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. since + point 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. for a period (from start to end) >===< since a point (up to now) x===>| for 20 minutes for three days for 6 months for 4 years for 2 centuries for a long time for ever etc since 9am since Monday since January since 1997 since 1500 since I left school since the beginning of time etc all tenses perfect tenses only For can be used with all tenses. Here are a few examples: They study for two hours every day. They are studying for three hours today. He has lived in Bangkok for a long time. He has been living in Paris for three months. I worked at that bank for five years. Will the universe continue for ever? For is NOT used with "all day", "all the time" etc. I was there all day. (not *for all day) Since is normally used with perfect tenses: He has been here since 9am. He has been working since he arrived. I had lived in New York since my childhood. Since can also be used in the structure "It is [period] since...": It is a year since I saw her. How long is it since you got married? Now check your understanding » Both for and since also have other meanings, with no reference to time. Here are some examples: This is for you. Is this the train for London? Since you ask, I'll say yes. Since he didn't study he didn't pass the exam. Cant See Links |
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