YOU SAID:

They work hard at the factory making iPhones

INTO JAPANESE

彼らはiPhoneを製造する工場で一生懸命働きます

BACK INTO ENGLISH

They work hard at the factory that manufactures the iPhone

INTO JAPANESE

彼らはiPhoneを製造する工場で一生懸命働いています

BACK INTO ENGLISH

They are working hard at the factory that manufactures the iPhone

INTO JAPANESE

彼らはiPhoneを製造する工場で一生懸命働いています

BACK INTO ENGLISH

They are working hard at the factory that manufactures the iPhone