YOU SAID:

I need to go to the store and buy some red bananas.

INTO JAPANESE

私は店に行き、赤いバナナを買う必要があります。

BACK INTO ENGLISH

I need to go to the store and buy a red banana.

INTO JAPANESE

私は店に行き、赤いバナナを買う必要があります。

BACK INTO ENGLISH

I need to go to the store and buy a red banana.