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difference among jechać, pojechać, and jeździć? [14]
To give you a very short explanation of perfective and imperfective:
imperfective - (e.g. wracać)
can be used for past, present and future tenses: wracałem, wracam, będę wracał
emphasis is on the action itself which normally occurs for a duration of time.
In the past tense you can think of it as "I was returning" i.e. an action in progress.
perfective - (e.g. wrócić)
can only be used for past and future. There is no present tense: wróciłem, wrócę
emphasis is on the result of the action, i.e. something you did. In the past tense you can think of it as "I returned" i.e. a completed action.
do a search on this forum for perfective/imperfective because this question is very regularly asked.