Add -er for the comparative and -st for the superlative.
Use the comparative with dan (kalmer dan…) and the superlative with het (het kalmste).
The comparative (vergrotende trap) of kalm is kalmer. Add -er for the comparative and -st for the superlative. Use it with 'dan': ...kalmer dan...
The superlative (overtreffende trap) of kalm is kalmst, usually used as het kalmste.
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