As was his custom, he knocked three times.
 

in Oxford online dictionary, there is a sentence:

As was his custom, he knocked three times.

has ellipsis been used in this sentence?
if yes, what is the lengthened form of the sentence?

Re: As was his custom, he knocked three times.
 

No - this is subject verb inversion, not ellipsis. the use of inversion after "as" has already been discussed as part of a longer question, which you can find here : http://www.eslhq.com/forums/esl-foru...emerson-47048/

Re: As was his custom, he knocked three times.
 

sorry for having omitting that thread

the first time read it I was none the wiser. I have read it once more, and your answer is really excellent. Thank you very much indeed.