快速地用英语可以说 "quickly"。这个词来自拉丁语 "quiēscō"，意思是 "to be quiet"。例句：

I need to finish this quickly. (我需要快速完成这件事。)

She spoke quickly, trying to finish before the bell rang. (她说话很快，试着在铃响之前完成。)

如果要表达 "very quickly"，可以说 "extremely quickly" 或 "very swiftly"。例句：

The fire spread extremely quickly. (火灾迅速蔓延。)

He moved very swiftly, dodging the enemy's attacks. (他移动迅速，躲避敌人的攻击。)