The present perfect continuous tense is used to describe an action that started in the past and has continued up to the present, or was recently completed but has some relevance to the present. This tense emphasizes the duration of the action.
Structure
Subject + has/have (helping verb) + been + base verb + -ing.To describe actions that started in the past and are still continuing.
1. I / wait / for you / all day
2. the children / sleep / since 8 PM
3. they / play / football / every evening
4. she / teach / at this school / since 2010
