sentence undergoes or is the object of the action named by the verb stem, and the second indicates that the subject of the sentence directs the action referred to by the verb stem. Tamil has three simple tenses—past, present, and future—indicated by the suffixes, as well as a series of perfects indicated by compound suffixes. Mood is implicit in Tamil, and is normally reflected by the same morphemes which mark tense categories. Tamil verbs also mark evidentiality, through the addition of the hearsay clitic . Verb inflection is shown below using example aḻintukkoṇṭiruntēṉ; (அழிந்துக்கொண்டிருந்தேன்); "(I) was being destroyed". Traditional grammars of Tamil do not distinguish between adjectives and adverbs, including both of them under the category uriccol, although modern grammarians tend to distinguish between them on morphological and syntactical grounds. Tamil has many ideophones that act as adverbs indicating the way the object in a given state "says" or "sounds". Tamil does not have articles. Definiteness and indefiniteness are either indicated by special grammatical devices, such as using the number "one" as an indefinite article, or by the context. In the first person plural, Tamil makes a distinction between inclusive pronouns (we), (our) that include the addressee and exclusive pronouns (we), (our) that do not. Syntax Tamil is a consistently head-final language. The verb comes at the end of the clause, with a typical word order of subject–object–verb (SOV). However, word order in Tamil is also flexible, so that surface permutations of the SOV order are possible with different pragmatic effects. Tamil has postpositions rather than prepositions. Demonstratives and modifiers precede the noun within the noun phrase. Subordinate clauses precede the verb of the matrix clause. Tamil is a null-subject language. Not all Tamil sentences have subjects, verbs, and objects. It is possible to construct grammatically valid and meaningful sentences which lack one or more of the three. For example, a sentence may only have a verb—such as ("completed")—or only a subject and object, without a verb such as ("That [is] my house"). Tamil does not have a copula (a linking verb equivalent to the word is). The word is included in the translations only to convey the meaning more easily. Vocabulary The vocabulary of Tamil is mainly Dravidian. A strong sense of linguistic purism is found in Modern Tamil, which opposes the use of foreign loanwords. Nonetheless, a number of words used in classical and modern Tamil are loanwords