If let you describe your feeling of falling in love ,what should be?

问题描述:

If let you describe your feeling of falling in love ,what should be?
what should be这里是不是省略了it啊,what should it be,几年没碰英语了,忘的差不多了,是不是虚拟语气啊,

不是虚拟 !
应该是省略了形式主语it,
意思是他应该是什么样