Your sentences are correct. I don't know of any exceptions to the rule so don't worry about it.
'I forgot you are always right'.
This might be an exception. We are arguing right now and you keep stubbornly holding your position.
With the right history of arguments with you I might say the line with the present tense.
I am not forgetting now; I forgot in the past but you still stubbornly think your position is always right.