In contrast with the present perfectThe aspect expressing completion. E.g.: He’s finished university. simple 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., which emphasisSpecial importance or attention given to something. E.g.: All I wanna do is have some fun.es the result of a completeA concept, related to the perfect aspect, expressing that an action has finished. E.g.: He’s finished university.d actionA general term expressing that somebody or something does something, the present perfect continuousThe aspect expressing duration, formed with be + verb-ing. E.g.: What are you doing? tense focusThe main or central point of attention or interest; what is emphasized. E.g.: All I wanna do is have some fun. ("all")es on the durationA concept, related to the continuous aspect, expressing that an action is in progress. E.g.: What are you doing? or the activity itself.

Check the following contrast between the past perfectThe aspect expressing completion. E.g.: He’s finished university. and the past perfect continuousThe aspect expressing duration, formed with be + verb-ing. E.g.: What are you doing?. The former emphasisSpecial importance or attention given to something. E.g.: All I wanna do is have some fun.es completionA concept, related to the perfect aspect, expressing that an action has finished. E.g.: He’s finished university. while the latter emphasises the activity or its durationA concept, related to the continuous aspect, expressing that an action is in progress. E.g.: What are you doing? .

By 6 he had eaten all the food. (there was nothing left)
He put down the fork he had been eating with and left the table.

EventA general term expressing that somebody or something does something or that something happens. E.g.: An apple fell on Isaac’s head.s and background descriptions in a story

In a story which is told in past time the events are expressed with past simple, whereas for background description past continuous is used.

The aspect of a verbA part of speech that expresses an action or a state. E.g.: John seldom plays tennis. does not mark when an actionA general term expressing that somebody or something does something takes place in timeA concept which is related to our perception of reality; that part of existence which is measured in seconds, minutes, hours, days, weeks, etc., but shows the relationship between the action and the passage of time, seen from the speaker's point of view.

There are two aspects in English: the continuousThe aspect expressing duration, formed with be + verb-ing. E.g.: What are you doing? (also called progressAn action is in progress when it is happening. E.g.: When I arrived he was surfing. ("he was surfing")ive) aspect expresses durationA concept, related to the continuous aspect, expressing that an action is in progress. E.g.: What are you doing? ; the perfectThe aspect expressing completion. E.g.: He’s finished university. aspect expresses completionA concept, related to the perfect aspect, expressing that an action has finished. E.g.: He’s finished university..