How common is it to say "I am sat" and "I am stood" instead of "I am sitting" and "I am standing"?
Recently I encountered these expressions and I'm wondering if the majority of people in the UK use "sat" and "stood." Also, are there any other instances like these? I mean beside sat and stood?

Question

Answer

It is informal British English.

Here is a recent discussion:
https://www.italki.com/question/484302

Answer

No, "I am sitting" and "I am standing"? are present continuous.
Sat and stood are past tenses.
I sat down, then I stood up then I left the room.

I do not know any grammar but I think sat and stood are in the Preterite tense, one of the past tenses.

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!