Appendix:Old Tupi adjectives

Most Old Tupi adjectives are formed with the noun's theme, which is obtained by removing its final atonic vowel, usually. Oxytone nouns stay unchanged when used as adjectives.

Types of use
Old Tupi adjectives can be either attributive or predicative.

Attributive
When attributive, the adjective always comes postpositioned and agglutinated to the noun, passing through the usual phonetic transformations. The resulting composition is threated as a noun and the suffix is added if the final word ends in a consonant — by rule, all nouns in Old Tupi must end in a vowel, stressed or not (see Appendix:Old Tupi nouns).


 * noun adjective

Predicative
When predicative, the adjective also comes after the noun, but not agglutinated. If the subject is a pronoun, the adjective is simply put together with it:


 * noun adjective

If the subject is a noun, between the two must come the third-person pronoun, which functions as a — this is called a copula. In English, this is usually done by the verb to be:


 * noun copula adjective

Possession
Adjectives can also be used to denote possession. Possessable nouns can be turned into adjectives by removing their final atonic vowel, giving the sense of having that thing.



As previously said, oxytones stay the same.



Pluriform adjectives
Adjectives can be pluriform if so is the noun they derivate from. Like pluriform nouns, they can only be found in its base form when agglutinated to other words.

Apart from the absolute (since adjectives will always be in relation to another word) and the R3 forms (as the pronoun is not used with adjectives) they both have the same inflections (see Appendix:Old Tupi nouns).