he is funnier than any other student in his class.(改为同义句)

He is the funniest student in his class.
注意:funniest前面不能加most因为funniest已经是最高级,当某个形容词为双音节词时,比较级是more+形容词原形;最高级是most+形容词原形.在这里funny是有自己的最高级funniest所以不用再加most了.

Nobody is funnier than him in his class.
he is funnier than other students in his class.

He is the most funny student in his class.

he is the funnest student in his class

He is the most funniest student in his class