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An example is singing, where strong forms may be used almost exclusively, apart (normally) from a, although weak forms may be used more frequently as tempo increases and note-values shorten. [citation needed] The vowel reduction in weak forms may be accompanied by other sound changes, such as h-dropping, consonant elision, and assimilation.
In a weak formulation, equations or conditions are no longer required to hold absolutely (and this is not even well defined) and has instead weak solutions only with respect to certain "test vectors" or "test functions". In a strong formulation, the solution space is constructed such that these equations or conditions are already fulfilled.
Weak form and strong form may refer to: Weaker and stronger versions of a hypothesis, theorem or physical law; Weak formulations and strong formulations of differential equations in mathematics; Differing pronunciations of words depending on emphasis; see Weak and strong forms in English; Weak and strong pronouns
An example of the latter is the weak and strong forms of certain English function words like some and but (pronounced /sʌm/, /bʌt/ when stressed but /s(ə)m/, /bət/ when unstressed). Dictionaries usually give the pronunciation used when the word is pronounced alone (its isolation form ) and with stress, but they may also note common weak ...
In that understanding, English has abundant examples of weak suppletion in its verbal inflection: e.g. bring/brought, take/took, see/saw, etc. Even though the forms are etymologically related in each pair, no productive morphological rule can derive one form from the other in synchrony.
As with the nouns, weak in this case means the declension in -n. In this context, the terms "strong" and "weak" seem particularly appropriate, since the strong declension carries more information about case and gender, while the weak declension is used in situations where the definite article already provides this information. Examples: strong:
This does not always apply, however, to the dropping of /h/ in weak forms of words like his and her. H-dropping in English is widely stigmatized, being perceived as a sign of poor or uneducated speech, and discouraged by schoolteachers. John Wells writes that it seems to be "the single most powerful pronunciation shibboleth in England." [10]
The irregular form tends to indicate duration, whereas the regular form often describes a short-term action (The fire burned for weeks. vs. He burnt his finger.), and in American English, the regular form is associated with the literal sense of a verb, while the irregular form with a figurative one.