grammaticality - Is it correct to use the past simple with 'Since'?

Is it correct to use the past simple with 'Since'?

For example:

I didn't see him since 1990.

I wouldn't say that as a native speaker but would always use the present perfect:

I haven't seen him since 1990.

Answer

Past tense denotes the completed state as of now. So it is not possible to use "since" as it implies uncompleted period (as of now).