The long double vowel becomes single when the syllable opens (groot → groter).
Use the comparative with dan (bozer dan…) and the superlative with het (het booste).
The comparative (vergrotende trap) of boos is bozer. The long double vowel becomes single when the syllable opens (groot → groter). Use it with 'dan': ...bozer dan...
The superlative (overtreffende trap) of boos is boost, usually used as het booste.
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