YOU SAID:

you could not walk outside on Dauphin Island without being swarmed by mosquitos

INTO JAPANESE

あなたは蚊に群がらずにドーフィン島の外を歩くことができなかった

BACK INTO ENGLISH

You couldn't walk outside Dauphin Island without swarming mosquitoes.

INTO JAPANESE

あなたは蚊を群がらなければドーフィン島の外を歩くことができませんでした。

BACK INTO ENGLISH

You couldn't walk outside Dauphin Island without swarming mosquitoes.