一、often

　　adv.經(jīng)常;常常;時(shí)常;再三

　　例句

　　1、This resulted in overpriced and often inferior products

　　這就導致了標價(jià)過(guò)高而往往質(zhì)量低劣的產(chǎn)品的出現。

　　2、People often have incorrect information about food.

　　人們對食物經(jīng)常會(huì )有不正確的認識。

　　3、She was often downright rude to him.

　　她常對他十分粗魯。

　　二、usually

　　adv.通常，經(jīng)常，平常，慣常地;一直，向來(lái);

　　例句

　　1、This year hotels that usually are jammed had vacancies all summer.

　　今年，那些通常爆滿(mǎn)的旅店整個(gè)夏天都有空客房。

　　2、Finance is usually the biggest problem for students.

　　經(jīng)濟問(wèn)題通常是學(xué)生最大的問(wèn)題。

　　3、This condition usually clears up with regular shampooing.

　　這種情形通常多用香波洗洗頭即可消除。