I was interested in physics since I was child

English as a Second Language English Vocabulary, Grammar and Idioms
1

I was interested in physics since I was child.
[ correct the tense of the verb]

Is my answer correct?

  • I have been interested in physics since i was a child.

Or I have been interested in physics since i have been a child.

2

If you are still interested in physics:

I have been interested in physics since I was a child.

3

Can the second 2nd answer be correct?

I have been interested in physics since i have been a child

4

No.

5

Thanks a lot!