YOU SAID:

I had a dream that I could fly.

INTO JAPANESE

飛べる夢を見ました。

BACK INTO ENGLISH

I had a dream of flying.

INTO JAPANESE

私は飛ぶことを夢見ていました。

BACK INTO ENGLISH

I dreamed of flying.

INTO JAPANESE

私は飛ぶことを夢見ていた。

BACK INTO ENGLISH

I dreamed of flying.