PRESENT SIMPLE: permanent situations or states, repeated or habitual actions, general truths or laws of nature, timetables or programmes, reveiws, sport commentaries or narrations, PRESENT CONTINUOUS: actions at or around the moment of speaking, temporary situations, repeated actions with "always" to show annoyance, fixed arrangements in the near future, changing or developing situations, PRESENT PERFECT: recently completed actions, emphasis on number, personal experience / changes, actions which happened at an unstated past time and are connected with the present, PRESENT PERFECT CONTINUOUS: past actions of certain duration having visible results or effects in the present, actions expressing anger, irritation, annoyance, explanation or criticism, emphasis on duration (usually with for, since or how long), actions started in the past and continuing up to the present,

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