> **Possible Duplicate:**  
> [Why do written English vowels differ from other Latin-based orthographies?](http://english.stackexchange.com/questions/235/why-do-written-english-vowels-differ-from-other-latin-based-orthographies)  

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If 'do' is pronounced **doo** and 'to' is pronunced **too**, why is 'go' pronounced **goh** and not **goo**?