Thank you for your response.
My problem is that I’m not sure and I don’t understand sounds to me NOT as equivalents. Two different meanings…
Thank you for the ‘about’.
Is ‘I am not yet clear as to …’ also possible? (It seems that I saw something the like, but I’m not quite sure about that now. )
If I am not mistaken, they also use that in the case of clearance of some criminal/police suspicions – after investigations?
My own clearance process with CRB (to get the permission to carry out some specific job) isn’t yet finished (I was told that in the UK it normally takes about three weeks).
When it eventually finishes I will be clear or cleared?
By the way, I also heard the expression win clear
P.S. Amy, once I promised to report about some of my troubles with Adjective vs. Past Participle – and this seems to be the case…