But this is a Nname - not a phrase connoting action.
Although all the Rabbinic commentaries discourse on what future
actions G-d is referring to - hence the reason G-d uses future tense
in this Name.
Shoshanna
That may be more information than you wanted. Anyway, the short answer
is that translators often translate the verb in Ex. 3.14 as a present
tense because it is quite common for a yiqtol to represent an action
that occurs in the present (from the perspective of the speaker).