Why does い become く?


I noticed many i-adjectives ending with く. I need to know why that happens.

いつか、あなたは背が **高く** なるでしょう。




Simply because that is how you use i-adjective.

i-adjectives

> 高 **い** -> tall  
>  高 **くない** -> not tall  
>  高 **くなる** -> become tall

na-adjectives

> すてき -> lovely  
>  すてき **じゃない** -> not lovely  
>  すてき **になる** -> become lovely




Simply because that is how you use i-adjective.

i-adjectives

> 高 **い** -> tall  
>  高 **くない** -> not tall  
>  高 **くなる** -> become tall

na-adjectives

> すてき -> lovely  
>  すてき **じゃない** -> not lovely  
>  すてき **になる** -> become lovely

