母(はは) hahaは wa夕(ゆう)食(しょく) yuushokuの no用(よう)意(い) youiを oしている shiteiruところ tokoroです desu。 My mother is right in the middle of preparing dinner. Literal Mother [topic-は] dinner [possessive-の] preparations [object-を] is-doing-[in-progress-ところです] ~ているところです = 'is right in the middle of doing X.' ところ adds temporal precision: not just 'is doing' but 'is at the point of doing (right now).' More immediate than plain ている. foodfamilycooking~ているところ (in the middle of doing)
母(はは) hahaは wa夕(ゆう)食(しょく) yuushokuの no用(よう)意(い) youiを oしている shiteiruところ tokoroです desu。 My mother is right in the middle of preparing dinner. Literal Mother [topic-は] dinner [possessive-の] preparations [object-を] is-doing-[in-progress-ところです] ~ているところです = 'is right in the middle of doing X.' ところ adds temporal precision: not just 'is doing' but 'is at the point of doing (right now).' More immediate than plain ている. foodfamilycooking~ているところ (in the middle of doing)