Add -er for the comparative and -st for the superlative.
Use the comparative with dan (zieker dan…) and the superlative with het (het ziekste).
The comparative (vergrotende trap) of ziek is zieker. Add -er for the comparative and -st for the superlative. Use it with 'dan': ...zieker dan...
The superlative (overtreffende trap) of ziek is ziekst, usually used as het ziekste.
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