what's structure

Most people would say, "what am I to be afraid of". There is a rule that you should not end a sentence with a preposition (of), in which case, your construct is correct. However it sounds rather formal and perhaps pompous to some ears.

Hi,

UltimatePedantThere is a rule...

You should have said, "There is a grammar myth..."

If i say " what I am afraid of " what's difference ?

Germany EnglandWhen there is this type of danger,of what am I to be afraid ?
I want to ask about "of what am I to be afraid '

of what am I to be afraid? ~ what am I to be afraid of? ~ what am I supposed to be afraid of? ~ what should I be afraid of?

CJ

Germany EnglandIf i say " what I am afraid of " what's difference ?

I am is the statement form, the assertive form, the declarative form, whichever you want to call it.
am I is the question form, the interrogative form, whichever you want to call it.

In the context of your original post, you had a question, so you need the word order

To Regards, "You should have said, "There is a grammar myth...".

You should check with a few dictionaries about what a rule is, before you describe thinking as correct or not. There are many "rules" or conventions around and they are not myths, in either sense of the word. They were introduced to help (in the estimation of the instigators) promote clear English. In the case of the preposi