it (has been rained) all morning这里去掉been行不行,为什么?

问题描述:

it (has been rained) all morning这里去掉been行不行,为什么?

应该是 It has been raining all morning.强调整个早上都下雨,到现在还在下.
或者 It has rained all morning.已经下了一早上了,但不强调现在还在下.