We use the present perfect to talk about present activities that started in the past. We use for to talk about the period of time up to the present, e.g. for four years, for two days. The company has been in business for four years.

Can you use present perfect with for and since?

We use Present Perfect tense to talk about action which started in the past and continues up to the present. For and since are used with the present perfect to indicate time. We use for to talk about a period of time (a few days, half an hour, two years...)

What is an example of present perfect?

Examples of using present perfect in talking about events that happened in the recent past but the effect of the recent event is still felt in the present include: The children have made a mess in the kitchen. He has started a new job. She has finished her chores.