Chinese technically does not have grammar tenses, but it has aspects indicated by particles. They mark the completion status, direction, presence, and so on.
However, the verbs themselves don't have tense. So these sentences can be identical: "I will walk home, then I will eat a cake" and "I walked home, then I ate a cake".
The overall timeframe can be given by a larger context: "Once my shift is over, I ..." / "I drank too much yesterday, that's all I remember: ".
It's simply not possible in English because every verb has a grammar tense built into it.