The principle use.1. Used with the events happened in the past has till now, and will continue in the future, and will have two words are included.For for a few minutes. For a few hours, days, weeks. How many years).Since since (since hours where day week, month. Year).2. Use the events recently. And the incident ended. Often these words too.Already.Just.Yet.3. Used with the past not specify the time that happens, says only that did or didn"t do.
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