the plan landed lated late by two hours because of the bad weather.为什么用by 不用for啊?

问题描述:

the plan landed lated late by two hours because of the bad weather.
为什么用by 不用for啊?

这表示增加或减少了多少要用by.
for 没这个意思.
如 I improve my salary by 1000.