如果所比的东西是一个复数名词的话，就要把that也改为复数，例如：

The houses of the rich are generally larger than those of the poor.（阔人的房子都比穷人的大。）

Modern schools are far better than those of a century ago.（现代的学校比一世纪前的好得多了。）

Elizabeth’s expeditions by sea were in general more successful than those which she attempted by land.（伊丽莎白的海上远征，一般地看来，比陆上的远征更为成功。）兹再举出几个单数that的例，以供参考：

The climate of Taiwan is milder than that of Singapore.（台湾的气候比新加坡的温和。）

The climate is like that of France.（气候和法国相像。）

His manner was that of a gentleman.（他的态度有君子风。）

The weight of an ox is much more than that of a horse.（牛重于马。）

The cost of oil is less than that of gas.（油的价钱少于煤气的价钱。）