否定形式： neither (nor)+be, have，助动词或情态动词+ 主语；肯定形式：so+be, have，助动词或情态动词+主语。如：

He can't speak German, (and) neither can I. 他不会说德语， 我也不会。

You haven't finished reading it , no more have I. 你没看完， 我也一样（没看完）。

She is a bit nervous , (and) so am I. 他有点紧张，我也是。Wood doesn't conduct electricity, .

A) so doesn't rubber B) also doesn't rubber

C) nor does rubber D) nor rubber does C)为正确答案。

They have all got up, and .

A) Jack has too B) so has Jack

C) Jack hasn't D) also has Jack B)为正确答案。

但 than 和 as 后面的句子倒装一般较少见，例如： John plays tennis better than Tom (does).→ John plays tennis better than does Tom.

John plays tennis as well as Tom (does).→ John plays tennis as well as does Tom.

Air occupies space as any other fluid does.→ Air occupies space as does any other fluid.

二、虚拟结构中的条件从句省去 if 时，were，had 和 should 要移至主语之前。（见第四章“虚拟语气”第二节）