Aspectual information in LIS can be conveyed through lexical markers (LEXICON 3.3.2), adverbials or through morphological modification of the articulation of the verb sign, specifying whether the action is completed (perfective aspect) or not completed (imperfective aspect). The following sections describe the morphological processes LIS employs to express aspectual information, mainly consisting in movement manipulations, repetition and lengthening of the verb sign.