(1)so, neither, nor置于句首说明与前者情况一致时，如，
I like swimming, so does my brother.
(2)only +状语放在句首，如，Only through this method can we win.
Only in this way can we do the work well.
(3)含有否定意义的词置于句首，如，Hardly, scarcely, not, seldom, no sooner, never, little, at no time, in no way, no more等，如，Never had I heard that.
Little did I know about this.
(4)以often, so +形容词或副词开头的句子，如，
So heavy is the box that he cannot carry it.
(5)用于省略if的虚拟条件句中，将had, were, should提前，如，
Were I you, I wouldn't do that.
Had he come, we would have won.
(6)用于某些表示祝愿的句中，如，
May you be happy for ever.
例题
例1、Not only ____ this machine but ____ it.
A. can he run……can he repair B. can he run……he can repair
C. he can run……he can repair D. he can run……can he repair
例2、____, it is quite easy to drill a hole in it with laser(激光).
A. Hard although the diamond B. Hard as the diamond is
C. As the diamond is hard D. Has hard is the diamond
例3、Only in this way ____ to improve the situation there.
A. can you hope B. you can hope C. hope can D. you hope
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