YOU SAID:

The dog jumped over the brown fox and they came over for a party to sing a lovely song

INTO JAPANESE

犬は茶色のキツネを飛び越え、素敵な歌を歌うパーティーにやってきた

BACK INTO ENGLISH

The dog jumped over the brown fox and came to the party singing a nice song

INTO JAPANESE

犬は茶色のキツネを飛び越えて、素敵な歌を歌いながらパーティーにやってきた

BACK INTO ENGLISH

The dog jumped over the brown fox and came to the party singing a nice song