YOU SAID:

if everyone on the earth died at once humans would go extinct really really fast

INTO JAPANESE

地球上のすべての人が一度に死んだら、人間は本当に速く死滅するでしょう

BACK INTO ENGLISH

If all people on earth die at once, humans will die really fast

INTO JAPANESE

地球上のすべての人が一度に死ぬと、人間は本当に早く死ぬでしょう

BACK INTO ENGLISH

If everyone on earth dies at once, humans will die really fast

INTO JAPANESE

地球上のすべての人が一度に死ぬと、人間は本当に早く死ぬでしょう

BACK INTO ENGLISH

If everyone on earth dies at once, humans will die really fast