Session-7-Present Perfect Tense

We use Present Perfect tense when we want to talk about unfinished actions that started in the past and continue to the present. We use the Present Perfect to say that an action happened at an unspecified time before now. The exact time is not important. We CANNOT use the Present Perfect with specific time expressions such as: yesterday, one year ago, last week, when I was a child, when I lived in India, at that moment, that day, one day, etc.