Is it o.k. to conjugate the verb "blame" in this way?:
I am to blame.
You are to blame.
He/She/It is to blame...and so on.
In order to tell someone themselves blames something on.
Is it o.k. to conjugate the verb "blame" in this way?:
I am to blame.
You are to blame.
He/She/It is to blame...and so on.
In order to tell someone themselves blames something on.
Yes, it is acceptable to use the word blame in the way you described.
Saying a phrase like "I am to blame" or the other examples you provided means that the object of the phrase should or could be blamed by anyone.
For example, if you said:
I blame myself.
This means that only the speaker is the one blaming themselves. Likewise in this example:
Jim blames Susan.
Here Jim is the only person blaming Susan. On the other hand:
I am to blame.
Susan is to blame.
This means that I or Susan can be reasonably blamed by anyone. It would be comparable to:
I am the person to blame.
or
I am the one for people to blame.