as do I 与 as I do（我也一样）
A third group can be characterized as words that link content across clauses – not only, neither, nor, so, and as, all of which arc shown in (55). The clauses in (55b), (55c), and (55d) of course involve ellipsis as well as inversion, so that, for example, (55c) corresponds to and we can do it (, too). For many native speakers, inversion after as is no longer obligatory, at least with the auxiliary do, as illustrated in (55d).
(55) a. Not only am I unhappy with his behavior, but I frankly just don't understand it.
b. A: I don't understand why she reacted that way. B. Neither do I. / Nor do we.
c. She can do it, and so can we.
d. He believes firmly in the goals of the project, as do I (inverted) / as I do (uninverted).
以上内容摘自剑桥大学出版社出版的《教师英语语法》（The Teacher's Grammar of English）。很显然这应该算是权威的，我们从其中的用法说明以及例句可以得出以下结论：