These are all present tense relating to a state represented by a perfective passive participle (acting as an adjective in a predicative construction). So the aspect is perfect and the tense is present, and there is some conditioning involved in each case which is not that different from the would case (below).
He may be finished.
She must be loved.
It can be done.
The following are indeed (expanding on Colin) often called conditional, future, and periphrastic future, but really there is no particular reason to single out these complex constructions and call them a tense, except that we are trying to impose ideas from Latin on English.
It would be done...
It will be done...
It is going to be done...
In fact these "tenses" come from different metaphors (act of the will that has been frustrated in the would case; moving along the path to achieving the goal).