In Bazaar Malay, habitual aspect is expressed with or without adverbs such as selalu 'always', kadang-kadang 'sometimes' and dulu 'before'.
Selalu and kadang-kadang normally indicate the present habitual aspect unless the
situational context makes it clear that the temporal location is in the past. The past habitual aspect is expressed through dulu ‘before/formerly’.
Source: Aye 2005: 172