YOU SAID:

It's the funniest thing I've seen in a long time

INTO JAPANESE

私は長い時間で見てきたおかしなことです。

BACK INTO ENGLISH

I am a funny thing I've seen in a long time.

INTO JAPANESE

私は長いこと見てきた面白いことです。

BACK INTO ENGLISH

I have been looking at long things and it is fun.

INTO JAPANESE

私は長いことを見ていて楽しいです。

BACK INTO ENGLISH

I am enjoying watching long things.

INTO JAPANESE

私は長いことを見て楽しんでいます。

BACK INTO ENGLISH

I am enjoying watching long things.