From: Arnt Richard Johansen <[log in to unmask]>

On Mon, Jan 23, 2012 at 10:48:40PM -0600, Ian Spolarich wrote:
> While working on a conlang of mine in which there is no future or present
> and only a nonpast tense,

Wait. How does this work? What is the difference between having one tense and having no tense at all? How are past events referred to in this language?

It works perfectly well in Indonesian: _ia nyanyi_ *depending on context* can mean he sings/is singing/will sing/sang.

There are of course numerous little particles that can clarify----

sedang..... progressive  (no intrinsic meaning)
akan, mau..... future (akan "    "      " ; mau 'want to'
dulu.... formerly, used to
sudah... either simple past or pres.perfect (sudah 'already')
mesti..... must (i think it's a verb in it's own right, and looks like a loanword?) 
harus... has to   ( "  "    "   "    ")
pernah.... once, ever