YOU SAID:

i own a lot of marbles

INTO JAPANESE

私はたくさんのビー玉を持っています

BACK INTO ENGLISH

I have a lot of marbles

INTO JAPANESE

たくさんのビー玉があります

BACK INTO ENGLISH

There are many marbles

INTO JAPANESE

たくさんのビー玉があります

BACK INTO ENGLISH

There are many marbles