Helen ( ) her keys in the office so she had to wait until her husban ( ) home.A.has left,comes B.left; had come C.had left; came D.had left; would come答案是选C把,为什么

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Helen ( ) her keys in the office so she had to wait until her husban ( ) home.
A.has left,comes B.left; had come C.had left; came D.had left; would come
答案是选C把,为什么

根据句中的had,可得知是对【已发生事情】的描写,故宜用过去时态,排除A.
接下来排除B,需分清这两个动作的先后.
排除D的理由是：【主将从现】即条件、时间状语需用一般时代替一般将来时,用一般过去时代替过去将来时.

是选【C】，看这句话，语态是过去语态，所以就要从过去时态里面选择。
又因为当她意识到落下钥匙这件事时，这件事已经发生了，也就是过去完成时。所以选择过去完成时。

C. had left; came 是答案 ~~
整句翻译：海伦把钥匙落在办公室了，于是她不得不等着丈夫回家才能进屋。 该句明显强调 把钥匙落在办公室的行为对 海伦后来的影响，所以应该使用完成时态。 had说明此句是过去时， 所以第一处空格里 只能是过去完成时。 CD入选。
后半句 until her husban ( ) home.也是过去时态下的，所以根据 “主将从现”的...

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C. had left; came 是答案 ~~
整句翻译：海伦把钥匙落在办公室了，于是她不得不等着丈夫回家才能进屋。 该句明显强调 把钥匙落在办公室的行为对 海伦后来的影响，所以应该使用完成时态。 had说明此句是过去时， 所以第一处空格里 只能是过去完成时。 CD入选。
后半句 until her husban ( ) home.也是过去时态下的，所以根据 “主将从现”的原则， husband came home 是正解。
所以选了C.
欢迎追问和采纳哦 ！！~~

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请帮我做几道英语选择题.分别说明下 是什么时态1.I won't lend you the book until I ( ) reading it.A.will finish B.have finished C.shall finished D.will have finished2.Helen ( ) her keys in the room so she had to wait until her husba 1.I won't lend you the book until I ( ) reading it.A.will finish B.have finished C.shall finished D.will have finished2.Helen ( ) her keys in the room so she had to wait until her husband ( ) home.A.has left,come B.left,had come C.had left,came D.had 请帮我做几道英语选择题,并简单分析下.1.I won't lend you the book until I ( ) reading it.A.will finish B.have finished C.shall finished D.will have finished2.Helen ( ) her keys in the room so she had to wait until her husband ( ) home. I h_____a setof keys.Her e_____is in her pencil case 填空 英语15.Helen _______ her keys in the office so she had to wait until her husband ________ home.15.Helen _______ her keys in the office so she had to wait until her husband ________ home.a.has left;comes b.left;had come c.had left;came d.had left;wo I give her the car keys and she helps me to bed Her new book if i were helen tells us her own stories and her difficult life.中文意思是什么 Helen _______ her keys in the office so she had to wait until her husband ________ home.a.has left;comes b.left;had come c.had left;came d.had left;would come要有解析, Helen _____ her keys in the office so she had to wait until her husband _____ home.A.had left; comes B.left; had come C.had left; came D.had left; would come Helen ( ) her keys in the office so she had to wait until her husban ( ) home.A.has left,comes B.left; had come C.had left; came D.had left; would come答案是选C把,为什么 Helen had lost her keys in the office so she had to wait until her husband —— home.A.came B.would come为什么选A不选B? Helen ,name ,her ,first ,is Tell Helen,if she is at home,I will come to see her.改写句子 Helen isn't a true friend of mine ,I feel truly sorry for her. 句式转换 同义词Those dictionaries are Helen‘s Are those her keys?Tese are my dictionaries Are those her erasers Is that Eric's schoolbag?Are these your rulers?改为同义词Those dictionaries areHelen‘s Are those her keys？These are my d Helen studies English well .I often learm ( ) A.from her B.from she C.with her D.with she Linda forgot (bring)her keys this afternoon I lost a s_______of keys.