副词only置于句首， 强调方式状语、 条件状语、 地点状语、 时间状语等状语时， 主句要进行部分倒装。如果被only所强调的状语为状语从句， 该状语从句不倒装， 只对主句进行倒装。例如: Only in a big city was it possible to buy a new wheelchair. 只有在大城市里才能买到新轮椅。Only when we had studied the data again did we realize that there was a mistake. 只有当我们再次研究了这些数据的时候， 我们才意识到出了一个错。 Only because there were some cancelled bookings did he get some tickets in the end. 一些预订被取消了， 他才得以买到了几张票。注意: 如果放于句首的only所修饰的不是状语时， 该句不用倒装。例如: Only John can save me. 只有约翰能够救我。Only some of the children passed the examination. 只有几个孩子通过了考试。给你几个相关的考题。[考题1] ____ by keeping down costs will Power Data hold its advantage over other companies. (2006浙江)A. Only B. Just C. Still D. Yet[答案] A[解析] 放于句首的only修饰方式状语by keeping down costs时， 全句要进行部分倒装， 而just, still, yet都无此用法。[考题2] Only in this way ____ to make improvements in the operating system. (2003上海春)A. you can hope B. you did hopeC. can you hope D. did you hope[答案] C[解析] only在题干中放于句首并修饰方式状语in this way， 全句应进行部分倒装。又由于该句不是介绍过去的情况而是表述现实的一种状况， 所以不应采用一般过去时， 本题应选C。[考题3] ____ can you expect to get a rise. (2001北京、 安徽春)A. With hard work B. Although work hardC. Only with hard work D. Now that he works hard[答案] C[解析] 题干中句子的结构显然为部分倒装语序， 四个选项中只有C选项修饰方式状语with hard work的only可以引导倒装句， 因此本题应选C。[考题4] Only when your identity has been checked, ____. (2003上海)A. you are allowed in B. you will be allowed inC. will you allow in D. will you be allowed in[答案] D[解析] 放于句首的only修饰when引导的时间状语从句时， 主句应进行部分倒装(从句中不进行倒装)。[考题5] Only then ____ how much damage had been caused. (2006陕西)A. she realized B. she had realizedC. had she realized D. did she realize[答案] D[解析] 放于句首的only修饰时间状语then时， 主句应进行部分倒装， 而且主句中“她意识到……”这一过去的动作对应的是“已导致损失”这一发生得更早的动作， 所以下划线应与后面宾语从句中的过去完成时相呼应， 采用一般过去时的形式， 据此可以分别排除选项A、 B和C而选出D。
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