<ghe'> is “be transformed, transmuted, metamorphosed, totally altered”
<ghe'moH> is “cause to be transformed, etc.”

tlhIngan Hol has no tense, so <maS Daghe'moH'a'> could mean any of the following:

 Are you terraforming the moon?
Did you terraform the moon?

Did you terraform the moon is a perfective concept in almost any context: you're asking about a completed event from your viewpoint of asking about a past action. It requires a perfective marker.

Now, if you're asking whether terraforming was the sort of thing you did in the past, then you don't need perfective for that, because you're not asking about a completed event. "Last year I was on the moon-terraforming team. I look forward to the day they finish that."

Will you terraform the moon?

The addition of a type-7 suffix can add additional clarity, though it is not required. For example:

The addition of a type 7 suffix is required if you intend to express the concept represented by that suffix. If you intend to describe something with perfective, then you must use a perfective suffix (or rIntaH). If you intend to describe something that is ongoing, then you must use a continuous suffix. Lacking any such suffix means the action is not completed and not continuous.

You can't leave off an aspect suffix when describing an aspect any more than you can leave off -laH when encoding ability into a verb.

-- 
SuStel
http://trimboli.name