YOU SAID:
I like eating pizza while sitting in a chair
INTO JAPANESE
私は椅子に座りながらピザを食べるのが好きです
BACK INTO ENGLISH
I like eating pizza while sitting on a chair
INTO JAPANESE
私は椅子に座りながらピザを食べるのが好きです
BACK INTO ENGLISH
I like eating pizza while sitting on a chair
You've done this before, haven't you.