If he eats, he leaves the food where it is! If he undresses himself, he leaves his clothes scattered on the floor!
「皿は洗わない、ゴミは捨てない。」＝"He doesn't wash the dishes, and he doesn't take out the trash."
「小銭はその辺にいつも置きっぱなし。」＝"He leaves change lying around in the house."
"If he eats, he leaves the food where it is! "＝「食べたら、彼はそのまま食べ物を置いておく！」
"If he undresses himself, he leaves his clothes scattered on the floor!"＝「洋服を脱いだら、自分の洋服を床に散乱させたまま！」
Whenever he's done eating, he just leaves his dishes wherever he was sitting and the same goes for his clothes when he undresses!
ーWhenever he's done eating, he just leaves his dishes wherever he was sitting and the same goes for his clothes when he changes!
「彼は食べ終わると座ってたところにお皿を置きっぱなし、服も一緒で、着替えたら服を脱ぎっぱなし！」
just leaves his dishes で「お皿を置きっぱなし」
the same goes for... で「…も同様で」
ーHe always leaves his dishes and clothes everywhere!
「彼はいつもお皿を置きっぱなし、服もあちこちに脱ぎっぱなし！」
leaves clothes everywhere で「服をあちこちに脱ぎっぱなし」
ご参考まで！
アメリカ合衆国 
カナダ 
