Réponse :

EXO 1

Adj court + comparatif : Tall --> taller than ; far --> farther than ; easy --> easier than ; long --> longer than ; nice --> nicer than ; happy --> happier  than ; good --> better than ; late --> later than ; bad --> worse than ; early --> earlier than  ; bright --> brighter than ; big --> bigger than ; hard --> harder than  ; fat --> fatter than ; clever --> cleverer than ; funny  funnier than

Adj long + comparative : modern  more modern than ; famous  more famous than ; important  more important than ; intelligent  more intelligent than ; boring  more boring than ; interesting  more interesting than ;  

EXO 2

more difficult than ; faster than ; older than ; more expensive ; cheaper than ; better than ; harder than

EXO 3

David is taller and bigger than Jenifer, but Jenifer is thinner than him.

Averel is taller than his brothers but he is less intelligent.

I hate chemistry : it is less interesting than biology.

I'm better in Maths than in English. The best is Yanis.

EXO 4

COMPARATIF

Joe is more intelligent than his brothers.

Averel is less clever than William.a

Averel is funnier than Joe.

Joe is smaller than Jack.

William is taller than Jack.

Averel is nicer than his brothers but he is also more stupid than them.

SUPERLATIF

Joe is the most intelligent but also the smallest.

Averel is the funniest.