This week we are looking at the present perfect tense. The present perfect is used to describe things that started in the past and are still happening now. For things that are finished we use the past simple. Times that started in the past and are still happening now: Today, This week, This year, “yet” etc. We also use the present perfect when something has just finished, but the effects are still active such as “I have been running all day, that’s why I am so tired”.