On grammatical class:

da'e
pro-sumti: remote future utterance; "He'll tell you tomorrow. IT will be a doozy.".
da'u
pro-sumti: a remote past utterance; "She couldn't have known that IT would be true.".
de'e
pro-sumti: a near future utterance.
de'u
pro-sumti: a recent utterance.
dei
pro-sumti: this utterance.
di'e
pro-sumti: the next utterance.
di'u
pro-sumti: the last utterance.
do'i
pro-sumti: elliptical/unspecified utterance variable.