English has what are commonly refereed to as the five "w"s, when, where, why, who, and what. These are simply sudreil's equivalents and other grammatical particles used for questioning.
You might notice a pattern here: all these words end with the morpheme /leə /, which means to be unknown. Therefore, "when" can be understood as "time that is unknown". The sudreil translation of (Time + Unknown) is simply pwa + leə , so pwaleə means when. This patter holds true for all of these words, and others such as /itazɔesleə esθwa/. (Go + Present + Imperfective + Unknown + Able) = "Able to currently be going?"
Perhaps the most easy to use and most common question particle/morpheme however is /ru/. This is simply added to the end of a statement that you want to turn into a question, and effects everything in said statement that comes before it.
Ex.
Using /leə / and /ru/ pretty much covers all of your bases, and allows you to ask a question in any scenario that is grammatically correct in sudreil. It is important to remember when choosing between the two that ru makes the everything before it in a statement a question, while leə only makes the thing it is attached to unknown. An example of this difference is shown here:
θeile italeəes?
θeile itaes ru na?