YOU SAID:

See was wearing black

INTO JAPANESE

参照は、黒を着ていた

BACK INTO ENGLISH

See wore black

INTO JAPANESE

参照してください黒を着ていた。

BACK INTO ENGLISH

See was dressed in black.

INTO JAPANESE

彼は黒ずくめの服装をしていた。

BACK INTO ENGLISH

He was dressed in black.

INTO JAPANESE

彼は黒ずくめの服装をしていた。

BACK INTO ENGLISH

He was dressed in black.