Question

. I last saw him in 2001. (Use: since)
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Answer 1

Answer:

I didn't see him since 2001.

Answer 2

Explanation:

the answer is:-

question:-

I last saw him in 2001. ( begin : since)

answer:-

Since 2001, I hadn't seen him.

or

I hadn't seen him since 2001.

hope it helps you.....