things used to be like that for me when i was starting to work here in Qatar, I really got a shock since i never experienced such temper since i have started working during and after my college days....anyway, i was always so hesistant to ask, and to make things worse.... i noticed that since i did not feel like talking since i fear that all the time i am making mistakes...i tend to forget some instructions...i used to cry..but then i realized, i have my own shortcomings too... when i started focusing and i spent longer time in the office to make my self understand more...like study the things and make myself familiar with all the transactions....that's the only time i built my confidence and i should say it had really helped me alot until this day....my boss and me sometimes have our differences in outlook but most of the time we work in harmony....i hope this helped....oh, and by the way...always keep a diary or notepad and a pen with you to keep you always on track..and always keep your focus specially when talking to him...listen with your ears and eyes... and keep your fingers busy by noting all that he's saying....good luck!!!