Morpheme

Isolation forms The isolation form of a morpheme is the form in which that morpheme appears in isolation (when not subject to the effects of any other morpheme).

Within much morpheme-based morphological theory, the two views are mixed in unsystematic ways so a writer may refer to "the morpheme plural" and "the morpheme -s" in the same sentence.

A morphophoneme within a morpheme can be expressed in different ways in different allomorphs of that morpheme (according to morphophonological rules).

Morpheme-based theories usually have no problems with this situation since one says that a given morpheme has two categories.

A morpheme is defined as the minimal meaningful unit of a language.

An agent morpheme is an affix like -er that transforms a verb into a noun (e.g. teach ⇒ teacher).

An example of a morphophonological alternation in English is provided by the plural morpheme, written as "-s" or "-es".

An example of this is that the English plural morpheme is written -s regardless of whether it is pronounced as /s/ or /z/ ; we write cats and dogs, not dogz.

Chomsky & Halle 1968:54 In these cases, a given morpheme (i.e. a component of a word) has a fixed spelling even though it is pronounced differently in different words.

For Bloomfield, the morpheme was the minimal form with meaning, but did not have meaning itself.

Graphemes do not cross morpheme boundaries.

He argues strongly for imaginative use of the basic Esperanto morpheme inventory and word-formation techniques, and against unnecessary importation of neologisms from European languages.

Instead, about 90% of Chinese characters are compounds of a determinative (called a ' radical '), which may not exist independently, and a phonetic complement indicates the approximant pronunciation of the morpheme.

In the modern varieties, it is still usually the case that a morpheme (unit of meaning) is a single syllable; contrast English, with plenty of multi-syllable morphemes, both bound and free, such as "seven", "elephant", "para-" and "-able".

It is often reasonable to assume that the isolation form of a morpheme provides its underlying representation.

Models There are three principal approaches to morphology and each tries to capture the distinctions above in different ways: * Morpheme-based morphology, which makes use of an item-and-arrangement approach.

Moreover, cognates may have different lexical categories ; for example, the morpheme phīⁿ means not only "nose" (a noun, as in Mandarin bí) but also "to smell" (a verb, unlike Mandarin).

Since Standard Spanish uses final /s/ in the morpheme marking the second person subject "you" in verbs, the Caribbean varieties now have to express the second person using the pronoun tú.

That is not always the case, however; sometimes the isolation form itself is subject to neutralization that does not apply to some other instances of the morpheme.

That leads to one bound morpheme conveying multiple pieces of information.