To make a positive comparison (more than) in French is much simpler than in English.
My dog is happier than your dog. -- Mon chien est plus content que ton chien.
The cat is more active than the cow. - Le chat est plus actif que la vache.
The beaches in Vermont are rockier than in Florida. - Les plages au Vermont sont plus rocheueses qu'en Floride.
The lesser comparison (less than) is equally as easy.
Vermont is less cosmopolitan than New York. - Vermont est moins cosmopolite que NY
A horse is less expensive than a car. - Une cheval est moins cher qu'une voiture.
The comparative of equality (as...as) does not use the same word twice in French as is does in English.
A sheep is as cute as a bunny. - Un mouton est aussi adorable qu'un lapin.
The Mountains of Vermont are as pretty as the lakes. - Les montagnes de Vermont sont aussi belles que les lacs.
Aussi can also be shorted to "si"... Le cheval court si vite que le léopard. - The horse runs as quickly as the leopard.
better - meilleure
worse - pire
My chicken is better than your rooster - Mon poulet est meilleure que ton coq.
The rain is worse than the snow. - La pluie est pire que la neige.
The lions are worse than the tigers - Les lions sont pires que les tigres.
There are more than 5 rivers in Vermont. - Il y a plus de cinq fleuves dans le Vermont.
Je voyage dans l'Europe pour plus de deux semaines. - I am traveling in Europe for more than two weeks.
Le poulet a plus d'oeufs que moi. - The chicken has more eggs than I.
Tu as moins de fleurs que ton ami. - You have fewer flowers than your friend.
Je vois autant de lacs que montagnes. - I see as many lakes as mountains.
The most significant difference with superlatives is in English we say "the tallest IN the class" they say "the tallest OF the class. " . Also, be sure to pay attention to adjective agreement AND adjective placement.
Ria is the best dog in Withy. - Ria est le meilleure chien de Withy.
Vermont is the best state in the country. - Le Vermont est le meilleure état du pays.
The kangaroo is the happiest animal in Australia. - Le kangourou est l'animal le plus content de l'Australie.
Nick and Erik are the nicest guys in the school. - Nick et Erik sont les garçons les plus gentils de l'école.
It is the prettiest valley in Vermont - C'est la vallée la plus belle du Vermont.
The disjunctive pronouns are : moi, toi, soi, (or use lui or elle), nous, vous, eux, elles for me, you, him/her, us, you, them. With comparisons in French you do use disjunctive pronouns (EVEN THOUGH YOU ARE NOT SUPPOSED TO IN ENGLISH)... technically in English you are supposed to say taller than I and not taller than me. In French you always say taller than me.
You are taller than I. - Tu es plus grand que moi