快的副詞用英語怎么表達？

　　他本不該把車開得那么快。

　　He oughtn't to have been driving so fast.

　　你怎么這么快就過來了？

　　How ever did you get here so quickly?

　　熱帶地區黑夜來得快。

　　Night descends quickly in the tropics.

　　我們的貨物周轉快。

　　We have a fast turnover of stock.

　　孩子比大人學得快。

　　Children learn faster than adults.