YOU SAID:

you cant have goose if you don't know ducks

INTO JAPANESE

アヒルがわからなければガチョウは飼えません

BACK INTO ENGLISH

If you don't know a duck, you can't keep a goose

INTO JAPANESE

アヒルを知らなければ、ガチョウを飼うことはできません

BACK INTO ENGLISH

You can't keep a goose without knowing a duck

INTO JAPANESE

アヒルを知らずにガチョウを飼うことはできません

BACK INTO ENGLISH

You can't keep a goose without knowing a duck