only在句首要倒装的情况
Only in this way,can you learn English well.
Only after being asked three times did he come to the meeting.
如果句子为主从复合句,则主句倒装,从句不倒装
Only when he is seriously ill,does he ever stay in bed
only引导的倒装句的结构是：only+副词/介词短语/状语从句 +助动词+句子剩余部分.
备考点拨：①only修饰主语时,不需要倒装；②注意倒装是把助动词提前,而不是把整个谓语提前.同时考虑题的时态和语态；
③倒装是主句的语序倒装,only修饰的状语从句和句子中的其他附属从句语序不变.