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1．There are various reasons why people write poems. 人们写诗有各种各样的原因。 (1)本句为主从复合句。why people write poems作reasons的定语。关系副词why在定语从句中作原因状语，可用for which代替。 You must tell him the reason why you won't accept his offer.你必须告诉他你为何拒绝他的建议。(why作原因状语) Did you hear the reason(that) he gave for being late? 你听到他为迟到而找的理由了吗？(that作宾语) 句式突破 (2)注意句型The reason why … is that … The reason why we don't trust him is that he often lies. 我们不信任他的原因是因为他时常说谎。 完成句子 他迟到的原因是因为他的车半道坏了。 The reason ____________________ was _________ his car broke down halfway. 【答案】why he was late；that 2．Should the traveller return，this stone would utter speech.行人归来石应语。 当if引导的虚拟条件句中有had，were，should时，可将if省去，将had，were，should提前，构成倒装语序。 Should I have time，I would call on him. 我要是有时间就去看望他。 Had we arrived here ten minutes earlier，we would have caught the bus. 要是我们早到达这儿十分钟，我们就赶上公共汽车了。 完成句子 如果他收到了礼物是应当向她道谢的。 _______________________，he should have thanked her. 【答案】Had he received the present | 
