In languages, agreement or concord is a form of cross-reference between different constituents of a sentence or phrase. Agreement happens when a word changes form depending on the other words to which it relates.
For example, one does not say I is in English, because I and is disagree in person. The word is is said not to agree with the word I. This is why the grammatical form is I am, even though the verb still has the same function and basic meaning.
The agreement based on overt grammatical numbers as above is formal agreement, in contrast to notional agreement that does so based on meaning.
Agreement often adds redundancy to languages.
Common types of characteristics that may trigger grammatical agreement – in nouns – are:
Similarly, there are also agreement categories of verbs.
Languages can have no conventional agreement whatsoever, as in Japanese or Malay; barely any, as in English; a small amount, as in spoken French; a moderate amount, as in Greek or Latin; or a large amount,…