everyday 同every day 有乜分別呢?

我回答過一模一樣的問題。

http://hk.knowledge.yahoo.com/question/?qid=7007010203644


「Everyday」 與「Every day」是不同的，而且不只是一個有空格，一個沒有空格。
兩者絕對不能互用。

「Everyday」是形容詞，解作「每天的」或「平常的」。
留意「的」字，代表了是形容詞，用來修飾名詞，並通常置在名詞之前。

例如： Potato chips are my everyday snack. 薯片是我每天的零食。


「Every day」是副詞片語，解作「每天」。
例如：I eat potato chips every day. 我每天都吃薯片。

這個連英語國家的人都經常犯的錯在《Common Errors in English Usage》這本書就有提及：

http://wsu.edu/~brians/errors/everyday.html

everyday:

adjective
1. of or pertaining to every day; daily: an everyday occurrence.
2. of or for ordinary days, as contrasted with Sundays, holidays, or special occasions: everyday clothes.
3. such as is met with every day; ordinary; commonplace: a placid, everyday scene.

–noun
4. the routine or ordinary day or occasion: We use inexpensive plates for everyday.

every day:

adjective
1. occurring or done each day; "a daily record"; "day-by-day labors of thousands of men and women"- H.S.Truman; "her day-after-day behavior"; "an every day occurrence" [syn: daily]

adverb
1. without missing a day; "he stops by daily" [syn: daily]