We use the Present Perfect Continuous to express

Варианты ответов и условие задания

1. emphasis on duration (usually with for, since or how long).
2. actions which happened at an unstated time in the past and are connected with the present.
3. repeated / habitual actions (especially with frequency adverbs: often, usually, etc).
4. temporary situations.
5. reviews / sports commentaries / dramatic narratives.