Tiffany求解，everyday和every day的区别和用法

【答案】:everyday,every day,one day,a day

everyday,every day ,意思都是"每天",但everyday作定语,如Everyday English.
every day 作状语, study English every day.

one day 过去或未来 有一天 如, I met him in a store one day. I will defeat them one day.

a day 泛指 任何一天. 如,An apple a day keeps a doctor away.

你的回答完美的解决了我的问题，谢谢！