was wereหลักการใช้ was wereใน past

was wereหลักการใช้ was wereใน past tenseเนื่องจากว่ามันเป็นช่องที่ 2 ของ is am are ดังนั้นหลักการใช้ก็จะเหมือนกันทุกประการ ต่างกันแค่ใช้เล่าเรื่องราวในอดีต แค่นั้นเอง I was a doctor. ผม (เคย) เป็นหมอ (ตอนนี้ไม่ได้เป็นแล้ว)

Results (English) 1:

was were
the principle was were used in the past tense
because it is a niche that is am are two of the principle is exactly the same. Use a different story in the past, just that
I was a doctor. I (had) a doctor (this is not already).

Results (English) 2:

Was were the principle of using was were in past tense, because it was the second channel of IS AM are, so the principle of use would be exactly the same. I (ever) as a doctor (now is not already)

Results (English) 3:

Yes
The principle of use in the past is tense.
Because it's the second part of M, its principle is exactly the same. Just use the stories of the past.
I'm a doctor. I used to be a doctor, but now I'm not.