PREPOSITIONS
Prepositions were little used by the Indian sign-talkers, though they did have above, about, across, around, at, below, beside, beyond, by, for, from, in, near, on, out, to,
under, upon, with, etc. Of or pertaining to has been added by the deaf.
CONJUNCTIONS
And or also (add on) but or if (pick out or cut off), so that, with are the equivalents of conjunctions. Sometimes the close continuity of two signs serves the purpose of “and,” conversely a pause may indicate a full stop.
INTERROGATION
The sign of interrogation always precedes the question, but is sometimes added after it as well, for emphasis or certainty.
PERIOD OR FULL STOP
For period, the sign finished is generally used. The Blackfeet make the sign broken off and often clap the flat right down on the flat left, palm to palm, for both beginning and end of a sentence.