1.比较级+than the others
2.The weather is colder than it was yesterday.这种说法对的
3.The wearher in Jinlin is colder than that was in Beijing 应该为
The wearher in Jinlin is colder than that in Beijing
因为这里的比较对象是The wearher in Jinlin和The wearher in Beijing
而这类比较后边的一个要用that代替the weather