YOU SAID:

I went to see the sea, but never saw a seal.

INTO JAPANESE

私は海を見に行ったが、アザラシを見たことがなかった。

BACK INTO ENGLISH

I went to see the sea, but I had never seen a seal.

INTO JAPANESE

私は海を見に行ったが、アザラシを見たことがなかった。

BACK INTO ENGLISH

I went to see the sea, but I had never seen a seal.