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！
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！
