Literary Chinese word for "but"

[Mark Yong]

In Michael A. Fuller's "An Introduction to Literary Chinese", he provides a full list of function words (虛詞) used in 文言文. There is, however, one function word that is not listed, i.e. the word for "but/however" (the equivalent of the modern Mandarin 但是, 不過, 可是, etc.).

Does anyone know what it is?

[Mark Yong]

Oops, I overlooked it - it was one of the last entries in Fuller's appendix (ordered by number of strokes): 顧. Is this correct?

[Andrew]

Surely 而 er3 is the most common.

[Mark Yong]

Surely 而 er3 is the most common.

True, I have seen 而 er3 used in the context of "but", in addition to its normal use as "and". Was just wondering if there was another auxiliary word that exclusively meant "but".

[ong]

http://218.69.114.37/wf/~CDDBN/Y400838/PDF/INDEX.HTM
http://218.69.114.37/wf/~CDDBN/Y442131/PDF/INDEX.HTM

[tharane]

I have seen 而 er3 used in the context of "but", in addition to its normal use as "and". Was just wondering if there was another auxiliary word that exclusively meant "but".