> **Possible Duplicate:**  
> [Is it “alright” or “allright”?](http://english.stackexchange.com/questions/12996/is-it-alright-or-allright)  

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Which is correct in English, "all right" or "alright"?

These expressions don't cause any problem in verbal communication but I confuse them while writing. To be frank, I sometimes use "all right" and sometimes "alright" without actually knowing which one is correct. If both of them are correct, how should I know which one to use in a particular case?