Circumstantial Participles

[jm15xy]

Hello,

I am currently going through H&Q Greek: An Intensive Course, and I have a doubt which does not appear very clear in the book. When a participle is used as the protasis of a conditional sentence, how do can I distinguish which kind of conditional sentence I'm dealing with?

[modus.irrealis]

In general you can tell by looking at the main verb, e.g.

τοῦτο ποιήσας νικήσεις = εἰ ποιήσῃς τοῦτο, νικήσεις
τοῦτο ποιήσας νικήσειας ἄν = εἰ ποιήσειας τοῦτο, νικήσειας ἄν
τοῦτο ποιήσας ἐνίκησας ἄν = εἰ έποίησας τοῦτο, ἐνίκησας ἄν

There are some cases where it could be ambiguous, but usually context should clear it up.