تَأْتِينِي غَدًا
You will come to me tomorrow (intended: please come tomorrow).
Taʾtīnī is an indicative imperfect with an object suffix, and ghadan is an adverb of time. In an appropriate setting “taʾtīnī ghadan” functions like “iʾtinī ghadan”—“Come tomorrow”—without adopting imperative morphology.
When used merely as a prediction it remains a report. With direct address, relevant authority or close relations, and an action the speaker wants, it can act as a request.
SentenceGrammatical formPossible force
Iʾtinī ghadanExplicit imperativeDirect request to come
Taʾtīnī ghadanImperfect declarativeIndirect request
Sayaʾtī Zaydun ghadanReport about ZaydForecast / information