聞いてない vs 聞いたことがない


I found this sentence

> そんなこと聞いてない!

Meaning something as "i have not heard that!"

and now im wondering, how would i change if i said:

> そんなこと聞いたことない

?




～ことがある/ない describes one's experience in the past (which can be many years
ago). ～ている/～ていない describes 1) one's habit, 2) the existence of the result of a
previous action, and 3) an ongoing action.

  * 彼はテレビを見ていない。  
He doesn't watch TV (on a regular basis). / He is not watching TV (now).

  * 彼はテレビを見たことがない。  
He has never seen a TV (in his life).

  * 彼女は寝ていない。  
She didn't sleep (last night, so she's sleepy).

  * 彼女は寝たことがない。  
She has never had a sleep (in her entire life).

  * 私はその小説を読んでいる。  
I'm a (regular) reader of that novel. / I have finished reading that novel
(and remember its contents). / I'm reading that novel (now).

  * 私はその小説を読んだことがある。  
I have read that novel (before).

  * そんなこと聞いてない。  
No one told that (a one-time request, etc) to me (so I didn't know that).

  * そんなこと聞いたことない。  
I have never heard such a thing (in my entire life).

For example, you have to say そんなこと聞いてない as a response to "So let's meet at the
station at 8 tomorrow", but you have to say そんなこと聞いたことない as a response to
"Don't you know penguins can fly?"




～ことがある/ない describes one's experience in the past (which can be many years
ago). ～ている/～ていない describes 1) one's habit, 2) the existence of the result of a
previous action, and 3) an ongoing action.

  * 彼はテレビを見ていない。  
He doesn't watch TV (on a regular basis). / He is not watching TV (now).

  * 彼はテレビを見たことがない。  
He has never seen a TV (in his life).

  * 彼女は寝ていない。  
She didn't sleep (last night, so she's sleepy).

  * 彼女は寝たことがない。  
She has never had a sleep (in her entire life).

  * 私はその小説を読んでいる。  
I'm a (regular) reader of that novel. / I have finished reading that novel
(and remember its contents). / I'm reading that novel (now).

  * 私はその小説を読んだことがある。  
I have read that novel (before).

  * そんなこと聞いてない。  
No one told that (a one-time request, etc) to me (so I didn't know that).

  * そんなこと聞いたことない。  
I have never heard such a thing (in my entire life).

For example, you have to say そんなこと聞いてない as a response to "So let's meet at the
station at 8 tomorrow", but you have to say そんなこと聞いたことない as a response to
"Don't you know penguins can fly?"

