Ответ:

I haven't seen this film yet.

I have never seen this film before.

I have already seen this film.

I have just seen this film.

I haven't made an article yet.

I have never made an article before.

I have already made an article.

I have just made an article.

I haven't read this magazine yet.

I have never read this magazine before.

I have already read this magazine.

I have just read this magazine.

I haven't worked on a computer yet.

I have never worked on a computer before.

I have just worked on a computer.

I have never gone to the forest before.

I haven't done this work yet.

I have already done this work.

I have just done this work.

I have never written in Japanese before.

I have already written in Japanese.

I have just written in Japanese.