present perfect simple and continuous

The present perfect simple tense is used to talk about a past time, which has very strong meaning for the present
Present Perfect Simple Timeline

For example:
Q) Where's Jane?
A) She has gone out. She should be back in an hour.
We form the present perfect simple by using the auxilliary verb have/has and the -ed form of the regular verb (the past participle) irregular verb
.
The present perfect simple is used to discuss events that have just been completed at the moment of speaking.
For example:
Q) Have you done your homework?"
A) "Yes, I've just finished it."
It is often used to suggest that a past action still has an effect upon something happening in the present.
For example:
"The pound has fallen against the dollar."
It is also used to discuss unfinished time.
For example:
Q) Have you done your homework today?
A) No, I haven't done it yet.
Note - You are talking about today and today isn't finished, so you may do your homework later!
Q) Have you ever been to England?"
A) "Yes I have."
Note - You are talking about something that has happened in your life and your life isn't finished!
You can also use the present perfect to discuss something from the past but you don't want to say exactly when.
For example:
Q) "Are you learning any languages?"
A) "Yes, I've begun to learn English."
This tense is often used to discuss events that have been happening over a period of time, but aren't finished yet.
For example:
Q) "How long have you studied English for?"
A) "I've studied English for 2 years now."

i hope you understand everything in the above
---------------------------------------
-------------------
------
-
from my mind

the present perfect tense
تكوينه:-

have / has + P.P

استخدامه :-

1- أحداث استغرقت فترة من الزمن حتى الوقت الحالي
we have learned a lot at this forum

2- أحداث بدأت في الماضي وما زالت في الوقت الحاضر
We have been at school since September

3- أحداث ماضية لها تأثير على الحاضر
My father has bought a new car

4- يستخدم مع الكلمات الأتية
Just – already – yet – ever – never – since – for

عند نفي فعل في زمن المضارع التام
نضع not بعد have/has
نضع yet في نهاية الجملة
تستخدم yet في حالتي الاستفهام والنفي
I haven’t met mohammed yet.
Have you met rakan yet?

تستخدم already لتعطي معنى أن الحدث تم دون أن يطلب منك القيام به
تستخدم just لتعطي معنى أن الحدث تم لحظة حدوث الكلام immediately
استخدام ever and never
I’ve already picked the flowers.
ahmed has just gone out

Have you ever been to Paris?
No, I have never been to Paris.

ahmed has learnt English since 1996
ahmed has learnt English for 1996

Since + نقطة بداية الحدث
For + مدة زمنية محددة

I haven’t met sara since she was 17 years old.
Since they came to Egypt, they have visited the pyramids.

Since…… Past simple ……… present perfect
present perfect …… since …… Past simple

يسلمو عاشقة لمرورك العطر