Aji, welcome Aboard. While I am happy to welcome you, I am unable to provide reassurance as to your problem, except ot say that even native English speakers may often have the same difficulty. There are some members of this Board who are, or appear to be, reasonably familiar with Putonghua, and I hope that one of these people may be of more assistance. Please stay around and see what developsfrom your query. I am sure you will find this site useful and informative.