This also indicates that noun inflection in possessive form in English is also not
a simple process, but one that requires a broad knowledge of the environments in
which–’s and–s’ can occur. According to Conway (1998), he discussed the problem of
English plurals, claimed that even at the lexical level, it can be a complex matter to
correctly inflect the individual words of a sentence to reflect their number, person,
mood, case, etc. However, Wagner (2008), posed questions regarding teaching
morphemes in a certain order, asking if it should be broadened to include other factors,
for example, should teachers focus on the morphemes on which students make the most
mistakes; should teachers focus on the most frequently used morphemes and disregard
acquisition order altogether and should teachers focus less on grammatical morphemes
and more on communicative ability.
The options for noun possessive inflection are more varied than simply adding
–’s or –s’ to the end of a noun.