quickly的形容詞形式是什么

　　例句：

　　It's another of his schemes to get rich quick.

　　那是他迅速致富的另一種計(jì)謀。

　　We need to make a quick decision.

　　我們需要當(dāng)機(jī)立斷。

　　He's a quick study.

　　他學(xué)東西特別快。

　　Could I have a quick word with you?

　　我能跟你快點(diǎn)兒說(shuō)句話嗎？