! 2 lettergrepen:
Eindigt het woord op -le, -er, -ow, -y? -> -er than / the -est
simple -> simpler than, the simplest
clever -> cleverer than, the cleverest
shallow -> shallower than, the shallowest
happy -> happier than, the happiest
De overige woorden met 2 lettergrepen: more ... than / the most ...