Thai is an analytic (or isolating) language, like many languages in Southeast Asia. Also like other languages in the region, Thai syntax conforms to subject–verb–object word order, is head-initial (displaying modified-modifier ordering), and has a noun classifier system. Basic Thai word order is also regular with every sentence structured by an "SVO (subject–verb–object)" order like English.
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Verbs
Thai verbs do not inflect to indicate tense, number, etc., so there are no plural verb forms. There are no conjugations for grammatical person either. There is no grammatical marker in Thai for the perfective/imperfective aspect. Past tense is expressed by adding a separate time word. When a verb is reduplicated, the action indicated by the verb is intensified.
Nouns
Thai nouns do not have a grammatical gender. Thai does not have an associative plural In a noun phrase construction "and" is different from "with". Certain nouns are reduplicated to form collectives, for example เด็ก dek (child) is often repeated as เด็ก ๆ dek dek to refer to a group of children.
Adjectives and adverbs
There is no morphological distinction between adjectives and adverbs in Thai. Many words can function as either. Adjectives can function in two different ways. They can be attributive, functioning to modify a noun to form a noun phrase. In this case they precede the noun they modify. Adjectives can also serve as predicate modifiers.
Articles
There are no articles in Thai like "the" or "a" in English.
Possession
Possession in Thai is indicated by adding the word "khong" in front of the noun or pronoun, but it may often be omitted.
Case
Thai does not possess a morphological case marker.