He wasn't ill; he stayed in bed from laziness.小哥这里的from可以用fo

ecause of 因为,由于 ；强调因果关系,个人以为是可以替换的
It is mainly because of my fault.
这主要是由于我的过错.
Because of the snow,the pilot had to land the plane at an airport in another city.
由于大雪,飞行员只得把飞机降落到另一座城市的一个飞机场.
for表原因更多的是用做连词