In the case of analgraffitti for brain storming, I picked a key word and created a sentence. This was to bear in mind that those words can be selected by the group for further break down.
The single word becomes triggers for answers. Yes they can become individual sentences the thing is if you drew an analgraffiti for it and thought of the same word again the letters bring back the same analysis. It becomes a type of self created anagram. Key words don't have to create a sentence. I haven't come across that limitation for analgraffiti. Not one of Vera examples in the Analgraffiti book did she structure the letters to a sentence. For some of the letters she drew 2 or 3 inital letter associaton. Most associative words are 2 word phases. This seem to me logical since the mind connects everything by association.
Need to make a speech about memory well an analgraffiti would be a good way to start to discover what you already know.
M = mind tricks
E= Eureka effect
M= madelines might not understand the connections for this one but it has got to do with sense of smell trigging memories.
O= Organising thoughts
R= receital/repetition
Y= Youth -age
This would give me something to talk about without having to do researd because I drew it up from my mind.
If I wanted to test my understanding of a subject I could do the same thing.
to make a sentence out of the word seems rather redundant when you can make associative thoughts and phrases that fan the further through the memory web.
Though if you wanted to make a sentence and it is meaningful for you then go for it. I'd be interested in knowing your experience. I don't think there is one final correct way to use analgraffiti. That would be self defeating.
Anyway, this topic has given me an idea. Going mind exploring if I don't come out send a torch 
Will come back and post if I find something.
Alex
