Question

I last saw him 2001 (use for)​

Answer 1

ANSWER:

THANKS FOR THE FREE POINT

Answer 2

Answer:

the sentence is inappropriate to use "for" there,

you can use since for point of time,

I have not seen him since 2001,

if you want to use for a period of time,

I have not seen him for 19 years.

Hope u understand :-)