1)Only +状语 句首 部分倒装:情态动词/助动词/be动词+主语+其余
Only then（副词） can you realize your dream.
Only in this way（介词短语） canyouimproveyour English.
Only （when the meeting was over 从句）didhe returnto work.
2）注意：only this way can help you improve your English.（only加主语的时候不到装）