About hedges, did you see the one that the man turned into a line of elephants that was on Yahoo the other day? A nice way to tame a hedge!
About the subjunctive (are you sitting down?) - from my teaching of ESL, it is a bit more organized than just bits and pieces.
There is a whole list of verbs that bespeak necessity, obligation and requirement that take the subjunctive, but it only really ‘shows’ up, for the lack of ‘s,’ in the third person singular. Most of these have other constructions that obviate the need for the sujunctive. I put together a list of about 25 - I am sure that it is not complete. However, there is ‘as if’ and ‘as though’ (He looks as though he has seen a ghost.). Then of course (already mentioned above) there is the second conditional (Were we to discuss this further, we might rue the day.) However, there is more.
I have a list of these ‘unreal tenses’ that is based on the information garnered from an EFL book published by Express Publishing in Greece. The author, who rechristened herself Virginia Evans from Virgeenia Pagoulatou-Vlachou (for good reasons if you want to sell your very brilliant EFL material out of country), got native speakers to put together a compendium of things like the subjunctive, which she quite intelligently renamed the ‘unreal’ tenses. Ms. Evans’ books for preparing people for the British Proficiency are treasure troves (Use of English, Vol 1, CPE). I am not ‘selling her’, but sharing the information. These subjunctive structures are:
I wish
As if/as though
If only
I’d rather
Supposing
Even if
It’s about time
That’s my contribution.
We all may rue the day.