YOU SAID:

we're going to need a bigger boat

INTO JAPANESE

私たちは大きな船が必要つもり

BACK INTO ENGLISH

We need big ships going to

INTO JAPANESE

大きな船に行く必要があります。

BACK INTO ENGLISH

You should go to the big ship.

INTO JAPANESE

大きな船に行く必要があります。

BACK INTO ENGLISH

You should go to the big ship.