What is the difference between 見てない and 見たことがない?


The title says it all, what's the difference between 見てない and 見たことがない?

Lately, I've seen japanese people using 見てない to express that they have never
seen something, eg:

> この映画は見てない。

But I thought that 見てない would be used in the following fashion:

> 今、映画を見てなくて、晩ご飯を食べてるよ。

And how different it is from:

> この映画を見たことがない。

is the usage of 見てない a set phrase or something?




見たことがない means "Someone has never seen something ever."

見てない is 見ていない that is omitted い. ～している has two meanings. One is progressive
form and the other is result state. So この映画は見てない means "I haven't watched this
movie.", it's the later usage. 見てない in 今、映画を見てなくて、晩ご飯を食べてるよ is the former
usage.

For example, you can say 彼をまだ今日見てない、but 彼をまだ今日見たことがない would be unnatural.




見たことがない means "Someone has never seen something ever."

見てない is 見ていない that is omitted い. ～している has two meanings. One is progressive
form and the other is result state. So この映画は見てない means "I haven't watched this
movie.", it's the later usage. 見てない in 今、映画を見てなくて、晩ご飯を食べてるよ is the former
usage.

For example, you can say 彼をまだ今日見てない、but 彼をまだ今日見たことがない would be unnatural.

