If one eventA general term expressing that somebody or something does something or that something happens. E.g.: An apple fell on Isaac’s head. depends on the completionA concept, related to the perfect aspect, expressing that an action has finished. E.g.: He’s finished university. of another, we can use the present perfectThe aspect expressing completion. E.g.: He’s finished university. 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. in the if-clauseA group of related words containing a subject and a verb..

If you’ve finished, (then) we’ll go.

The future perfectThe aspect expressing completion. E.g.: He’s finished university. 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. expresses that an eventA general term expressing that somebody or something does something or that something happens. E.g.: An apple fell on Isaac’s head. will be completeA concept, related to the perfect aspect, expressing that an action has finished. E.g.: He’s finished university.d before a point in the future. This event may happen at any time up to that point. It is normally used with time expressionA word or group of words used in a particular situation. E.g.: Good morning, at six, on the sofas and clauseA group of related words containing a subject and a verb.s beginning with by.

In time clauseA group of related words containing a subject and a verb.s (for example clauses with after, as soon as, until, when, while etc.) that refer to future time 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.