YOU SAID:

My sweaty mother is sat next to my large lawnmover

INTO JAPANESE

私の汗をかく母親は私の大きな芝生の横に座っています

BACK INTO ENGLISH

My sweaty mother is sitting beside my big lawn

INTO JAPANESE

私の汗だうな母は私の大きな芝生の横に座っている

BACK INTO ENGLISH

My sweaty mother is sitting beside my big lawn