[عماد ذكي]

الفاضل الاستاذ نبيل يعني هل نفترض صحة الكلام الي في الموقع الذي ذكرته
و لا نفترض صحة ما في المرجع الذي ذكرته بالنص ص 175 الرجاء الرجوع الى المرجع
وهذا نص ما به
The present perfect can be used with since/for/always etc, for an action which began in the past and is still continuing or has only just finished (see 186). The past perfect can be used similarly for an action which began before the time of speaking in the past, and
(a) was still continuing at that time or
(b) stopped at that time or just before it.
But note that the past perfect can also be used:
(c) for an action which stopped some time before the time of speaking.
Examples of types (a), (b) and (c)