Last week I helped my parents do housework 请问这句里的do是否用过去式

Last week I helped my parents do housework 请问这句里的do是否用过去式 I’m going to plant trees next week用last week改 had a happy weekend last week.On Saturday morning,I watched TV and helped my mother wash clothes把这个改为第一人称的 I lost my way last week.(last week)提问 I picked apple last week.对last week提问 Last weekend,I helped Mary ____ her math. I'm sorry______that your mother was ill in hospital last week I'm chewing last week's date这句话有文化义吗? 改错：1 .I helped my mun did housework last week 2 .I borrowed this book to my bast friend3.She is putting on yellow blouse today 4.There are some orange in bottle I ____(be)ill last week. Last week I asked students about f______. lost i my pen week last连词 Last week I asked students about f______. last week I watched a soap I ( ) her in the street last week I went hiking last week.(用next week改写 ) 英语翻译W：Have you seen Mr.Young lately?M:No,I haven't seen him since the week before last.Q:when did the man see Mr.young?答案是late last week early last week?还是two weeks ago “late last week early last week? Try to heip him write something about the trip.I'm Peter.Last week i visited the West Lake.