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例如： 1. Had you worked hard enough, you would have already passed the exam. 2. Should it happen, virtually nothing in the Known World could withstand it. 3. Were she not to experience such moments of trepidation there would be something strange in her nature indeed. 语料库语言学的菜鸟，我是学系统功能的，在这方面很白目，请大家帮忙！

大家好，我想用语料库检索倒装句，因为倒装句的种类比较多，所以要一种一种检索，我现在手上有BNC的语料库，SARA，但是我不知道怎么弄，师姐也说这个语料库检索句型不太好用。大家帮帮忙，给点建议吧，谢谢啦！！！