He found his keys was lost.这个句子对吗?如题那么这个句子里lost是作为形容词吗？

英语翻译He （） his keys ,but （） found them and （） them （） to him. Yesterday Tom was _______ enough to lose his keys.but today_______,he found his keys back(lucky)两个空都应在（luck)上改变 He found a ___________ of keys. He found his keys was lost.这个句子对吗?如题那么这个句子里lost是作为形容词吗？ He can't find his keys a______ when he ____ the door,he found his keys were nowhere.A.would open B.wasbto open C.opend 是A过去将来时吗？ When he _____the door,he found his keys were nowhere.A.would open B.opened C.was to open为什么说选项A有情感意味啊? when he ___the door,he found his keys were nowhere.1 would open 2 was to open选择哪一个,及分别说出分别为什么对与错 He found it easy _____(find)that set of keys. when he ( )the door ,he found his keys wewhen he ( )the door ,he found his keys were nowhere.A.would open B.opened C.had opened D.was to open答案是选D,但是A也表示过去完成时,为什么不选A? would do 和was to open when he ____ the door,he found his keys were nowhere.A.to,by B.when he ____ the door,he found his keys were nowhere.A.to,by B.by,to C.had opened D.was to .将要开的时候,但是would open 是will open的过去式,虽然常 He f____ found his dog When he the door,he found his keys were nowhere．A．would open B．openedC．had opened D．was to open我选的C,很不理解……求解释, when he ( )the door ,he found his keys were nowhere.A opened B would opened C was to opened为什么A不可以 不是时间状语从句中用一般时代替将来时么 还有为什么B不可以啊 he shut the door , only [ ] that he had locked his keys in the houseA finding B found C to find D having founded 为什么选C? 不选A B D ? Be to do 表将来的用法?为什么这个空选D?When he. the door ,he found his keys were nowhere. A would open B opened C had open D was to open The keys in the lost and found case is his．哪里错? F____,he found his lost bike.