Unless she had had an alarm clock, she would havemissed the train.（事实：她没有闹钟）中两个had是什么意思?

she had a sunny Unless she had had an alarm clock, she would havemissed the train.（事实：她没有闹钟）中两个had是什么意思? 关于英语 she had had a very hard timeshe had had a very hard time 为什么用两个 had .. Betty c____ to work after she had had a baby she had a little housework after lunch She had a （please） day yesterday She had had a good cry怎么had会连续出现?这个句子的结构是什么? do you know where ——?A.she had beenB.had she been C.had she gone D.she had gone 为什么选A不选B呢? She had a nice face,____?A.hadn't she B.did she C.had she D.didn't she She had a toothache=she had___ ___ ____ Though she was t_____,she had a very loud voice. she had fish and she had an english where had she been? She had trouble making___sentences. Only then___how much damage had been caused A:did she realize B:had she realized She had fewer problems,()she?A.did.B.didn't.C.had.D.hadn't She had been a good mother to four ,but she had survived them all 意思 谢