YOU SAID:
you could not walk outside on Dauphin Island without getting swarmed by mosquitos
INTO JAPANESE
あなたは蚊に群がることなく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.
That didn't even make that much sense in English.