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by mesutpiskin 618 days ago
There are two past tense forms in Turkish, both of which have been used since the Old Turkish period. Our suffixes for the witnessed past tense are "-dI / -dU." This suffix is explained as the witnessed past tense because the action occurred in front of the speaker's eyes in the past. Our suffixes for the inferential past tense are "-mIş / -mUş." These suffixes express that the action took place at an unseen time in the past. In today's written language, only "-mIş / -mUş" suffixes are used as the inferential past tense markers.

ref: https://turkishstudies.net/DergiTamDetay.aspx?ID=14135