Tenseis a grammatical concept that indicates the time of action or event. Tense provides temporal information and enables us to express actions that have happened in the past, are happening in the present, or will happen in the future. Tenses, in English Grammar, is the form of the verb which shows the time when a specific event has happened
Theyare simple, progressive, perfect, or perfect progressive. Simple is covered by the basic present, past, and future tense verb forms. A verb with a simple aspect doesn't necessarily specify if an action is complete or not. For an action that's ongoing or unfinished, you use continuous/progressive tenses.
Thefollowing examples express the use of present perfect continuous tense, without any duration. When we do not use duration, in order to emphasize the meaning, we use 'recently' or 'lately'. What have you been working on lately? Recently, she has been falling ill too often. Have you been eating healthy lately?