Itis a combination of the past and the present. You use it for actions that started in the past and ended in the present. The "Present Perfect" is also used when you talk about experiences that happened in the past, but you don't know the exact time. It is formed with have/has + regular verb + "-ed". For "irregular verbs," it is Emphasisingthe progress or duration of something, describing things that happened in the past and stopped or were over at a certain time later in the past. ‍. Structure. ‍. had (simple past form of to have) + been + Infinitive + ing. ‍. Signal words. ‍. for, since, how long, all day, after, before. .

time signal present perfect tense