YOU SAID:

The birds sing so beautifully

INTO JAPANESE

鳥たちはとても美しく歌う

BACK INTO ENGLISH

The birds sing very beautifully.

INTO JAPANESE

鳥はとても美しく歌います。

BACK INTO ENGLISH

The bird sings very beautifully.

INTO JAPANESE

その鳥はとても美しく歌う。

BACK INTO ENGLISH

The bird sings very beautifully.