While I am lying on the sofa, my mother is preparing dinner.
Is the use of WHILE correct in combination with a present continuous?
As a subordinating conjunction 'while' means whereas and is used to show direct opposition,
While: Subordinating Conjunction
EX: Whereas I am lying on the sofa, my mother is preparing dinner.
EX: My mother is preparing dinner,whereas I am lying on the sofa.
As a coordinating conjunction, 'while' and 'as' mean during that time and when used with the continuious/progressive are generally used with the past continuous because the meaning of 'during that time' indicates a past action in progess,
While: Coordinating Conjunction
EX: While I was lying on the sofa, my mother was preparing dinner.
EX: My mother was preparing dinner while I was lying on the sofa.