Which preverbal particle in Tok Pisin indicates future tense?

The preverbal particle 'bai' in Tok Pisin indicates future tense. In Tok Pisin, preverbal particles are used to mark grammatical features such as tense, aspect, and modality, since the verbs themselves do not change form to indicate these features. The particle 'bai', derived from the English word 'by and by', is placed before the verb to show that the action will happen in the future. For example, 'Mi bai go' means 'I will go'.