I don't really know where exactly to start, but it's a matter too hard for me, A non-native, to comprehend, so please bear with me.
He asked me to do.
He Threatened me to do.
I was told that the second example is wrong because "you can't threaten a direct object," so I should say: he threatened to.
My questions are: why isn't the first example wrong and the second one is? And can anyone tell me what is the name of that problem, if you find it as such, in grammar terms? What books can be helpful as far as this is concerned?
Thanks in advance.