Life Experience
Present Perfect
Use the present perfect when speaking about an experience that has happened before the present moment when the time of the event remains unspecified.
Example:
They haven't had a chance to develop a coherent doctrine for the NGO.
They haven't had the chance to develop a timetable for withdrawal during the conflict.
They've led diversity workshops in Atlanta.
In this case, the present perfect is used to express an experience without giving precise details. Whenever you speak about something that has happened up to now without giving a precise point in time, use the present perfect.
Positive Form:
They've led diversity workshops in Atlanta.
Negative Form:
They haven't had the chance to develop a timetable for withdrawal during the conflict.
Question Form:
Have you contacted that donor?
'Ever' and 'Never' with the Present Perfect
Use the present perfect with both 'ever' and 'never'. These time expressions are often used to to discuss experiences.
She has never worked for a donor organized NGO.
That company has never included due diligence as a part of their hiring process.
Place 'ever' or 'never' directly before the past participle in the question form.
Have they ever considered alternatives to the neoliberal approach to economic development?
Have you ever thought about underwriting the project?
'Never' means 'not ever' and is a negative form of the present perfect.