I had cut my finger when I was cooking 这里主句为什么要用过去完成时?

I had cut my finger when I was cooking 这里主句为什么要用过去完成时? Yesterday I ________ when I was cooking.A.had my finger cut I had my finger cut off 用 my cut I finger 组句子 She was cooking when she cut her finger This morning I had my finger ( ) when I was preparing breakf This morning I had my finger ______ when I was preparing bre I cut my finger yesterday.对cut my finger 提问 请问这一题为什么选AYesterday I ________ when I was cooking. A. had my She was with me when i had my fist accident,这里为什么不 When I was watching TV,my brother did his homework.主句为什么用过去时 I cut my finger this morning是病语吗