a (noun1) is 2 times (adjective)-(i)er than a (noun2).
a (noun1) is X times (adjective)-(i)er than a (noun2).
a (noun1) is several times (adjective)-(i)er than a (noun2).
China is 2 times bigger than Europe. (这句不应顶真的)
中国比澳洲大两倍。
His father is 3 times fatter than his mother.
他爸爸比他妈妈胖三倍。
His mother is 3 times skinnier than his father. (原型是 skinny 但是加 er, y 会变成 i; skinnier)
他妈妈比他爸爸瘦三倍。
A dolphin swims several times faster than a salmon.
海豚游泳比三文鱼快几倍。
我的中文翻译有可能错,请原谅。
希望这样你会学到,你打几个例句给我看。 我帮你改。