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It wasn't until nearly a month later that I received the manager's reply. 差不多一个月后，我才收到经理的答复。 It wasn't until we had stayed together for a couple of weeks that I found we had a lot in common. 直到我们在一起待了几个星期我才发现我们之间有很多共同之处。 【典例1】Only when the fire was under control________to return to their homes. A．the residents would be permitted B．had the residents been permitted C．would the residents be permitted D．the residents had been permitted 错因分析 考生易误选B项。分析句子结构可知，本题是对倒装结构的考查。根据语法知识可知，“only＋状语”位于句首时，其后的句子要采用倒装结构，故选项A和D可以首先被排除。在时间状语从句中，当从句用一般过去时态时，主句要用过去将来时态，故选C。 归纳总结 当“only＋状语”位于句首时，其后的句子要用倒装结构。该结构中的状语通常由副词、介词短语和状语从句(如本题)充当。该语法点是高考英语中的常见考点。 Only if you eat the correct foods will you be able to keep fit and stay healthy.只有你吃对食物，你才能够保持健康。 Only by keeping down costs will Power Data had its advantage over other companies. 只有降低成本，Power Data 公司才能比其他公司有优势。 另外，当only后接主语位于句首时，其后不用倒装。 Only he can go.只有他可以去。 【典例2】________that Marie was able to set up new branches elsewhere. A．So successful her business was B．So successful was her business C．So her business was successful D．So was her successful business 错因分析 考生容易误选A项。当“so＋adj./adv.”部分位于句首时，主句要采用倒装结构，而that从句不用倒装，故选B。 归纳总结 so＋adj./adv.＋that从句是英语中很常用的一种句式，意为“如此……以至于……”，多用于引导结果状语从句。 【典例3】I have been living in the United States for twenty years, but seldom________so lonely as now. A．have I felt | 
