Question about EU, AU, OU stem Consonant Declension

Greek Learning Greek
1

My question here is in regards to the examples given in Lesson 55 of “First Greek Book” by John W. White and page 69 of “Greek Grammar” by Herbert Weir Smyth.

http://daedalus.umkc.edu/FirstGreekBook/JWW_FGB55.html

Am I correct in assuming that if the noun is a masculine one, its singular accusative will have a added as its case ending while if its neuter or feminine, the case ending that will be added is v?

Or is the reason why basileus’ case ending is different from all the others another one that missed my head completely?

2

βοῦς can be both masculine and feminine though. So I think it’s better to say that stems in ευ have the accusative in α and happen to be all masculine (as far as I know). Stems in αυ and ου have the accusative in ν and happen to be mostly feminine.

3

All ευ stems should be masculine, as Bedwere deliberates. For some reason your link gives a younger nominative & vocative plural. A more classical form for it is βασιλῆς.