# Which adverbs of possibility and probability warrant the subjunctive?

On my previous question (thus begins the chain) I wrote a comment saying "Illa est bona idea. Fortasse rogem cras." I used the subjunctive because I take "fortasse" to mean "maybe", which to me warrants the potential subjunctive.

Is my conclusion correct? What other adverbs of possibility or probability would warrant the subjunctive? Take the following for example.

• fortasse
• forsitan
• forte
• fortassis
• probabiliter (probably, per this suggestion)
• veri simile est (same source as above)

Happy to hear your thoughts, primarily regarding the comment I wrote, but also regarding the other words in the bullet-list above.

My conjecture, which I will share with you briefly, is that words leaning towards "possibly, perchance, perhaps, maybe" take the subjunctive, but words leaning towards "probably, almost certainly, most likely" lean towards the indicative. I could easily be wrong.

• Good question! I'd note that while fortasse/fortassis tends to take the indicative, forsitan/forsan (probably a contraction of fors sit an) tends to take the subjunctive, so I wouldn't be so sure of your conjecture, though it makes sense at first glance. Nov 24, 2017 at 9:29
• @Anonym Ah, that's interesting. I would be interested to know why the indicative should be used in "Fortasse rogabo cras". Perhaps it's wrong of me to attribute all clauses of uncertainty to the subjunctive. Nov 24, 2017 at 9:34