[ابو بيشو]

المشاركة الأصلية كتبت بواسطة نادر الهادى

Who told you that there 's a mistake, sir?
we can use the present perfect whether in the affirmative, negative or interrogative to refer to past experiences (without saying when
So, we can say1- I've come here before. 2- when have you come?

شكرا جزيلا لحضرتك ولكن لو سمحت يجب الرجوع الى English Grammar In Use
تحت عنوان:Present perfect with how long and past simple with when
Unit 19