Question

we (live) here since 1980​

Answer 1

Answer:

We have been living here since 1980

Answer 2

We have been living here since 1980.

• In the mentioned sentence, the word "since" has been used as a preposition. It states the time.
• In such cases, perfect tense will be used.
• Both past and present perfect tense usage is allowed.
• Other examples using perfect tense and since are as follows -

1. We have been writing the exam since 12: 30 PM.
2. I was thinking about the lunch since I left school.