"No, my sister does not live with my mother."
Translation:لا، أُخْتي لا تَسْكُن مَعَ أُمّي.
June 28, 2019
Because the subject is أخت "sister", which is a feminine noun. The conjugation for سكن in the third person singular is يسكن for هو and تسكن for هي. If you're still stuck on conjugation, check out this page: