In time clauseA group of related words containing a subject and a verb.s that refer to future time (for example clauses with after, as soon as, until, when, while etc.) we use present tenseA grammatical category that is marked by verb inflection. To express when an event or action happens in time or when a state exists, we use tenses.s.

The past simple is used for actionA general term expressing that somebody or something does somethings which are completed at a definiteRelating to a specific or determined person, thing, idea or time. E.g.: I know the guy you are talking about. ("the guy you are talking about") point of timeA particular moment in time. E.g.: She came home at six. ("six") I was born in 1980. ("1980") in the past. This point can be implied, or expressed with a time expressionA word or group of words used in a particular situation. E.g.: Good morning, at six, on the sofa or a clauseA group of related words containing a subject and a verb.:

have + past participle