Degrees of Comparison.
There are three degrees of comparison, as in English:
The Positive, as bona, good; bela, beautiful; granda, big, great.
The Comparative is formed by placing pli (more) or malpli (less) before the positive, thus: bona, good—pli bona, better; bela, beautiful—malpli bela, less beautiful. The comparison may be heightened by using multe (much), thus: multe pli (or malpli) bela.
Than is translated by ol, thus: pli (or malpli) bela ol…, more (or less) beautiful than…
The Superlative degree is formed by using plej (most) with the positive; as bela, beautiful—plej bela, most beautiful.
Of with a superlative is translated by the preposition el (out of). La plej granda el ĉiuj, the greatest of all.
The more…the more, the less…the less, are translated by means of the particles ju and des. Thus: Ju pli oni studas, des pli oni lernas, the more one studies, the more one learns. Ju pli mi kun li parolas, des malpli mi lin estimas, the more I speak to him, the less I esteem him.