YOU SAID:
she sells sea shells on the sea shore i know their sea shells I am so very sure
INTO JAPANESE
彼女は海岸で海の貝殻を売っている私は彼らの海の貝殻を知っている私はとても確信している
BACK INTO ENGLISH
She sells sea shells on the coast, and I know their sea shells.
INTO JAPANESE
彼女は海岸で貝殻を売っていて、私は彼らの貝殻を知っています。
BACK INTO ENGLISH
She sells seashells on the coast, and I know their shells.
INTO JAPANESE
彼女は海岸で貝殻を売ってる貝殻は知ってる
BACK INTO ENGLISH
She sells seashells on the coast. I know shells.
INTO JAPANESE
彼女は海岸で貝殻を売っている。貝殻は知ってる
BACK INTO ENGLISH
She sells seashells on the coast. I know the shell.
INTO JAPANESE
彼女は海岸で貝殻を売っている。貝殻は知ってる
BACK INTO ENGLISH
She sells seashells on the coast. I know the shell.
That didn't even make that much sense in English.