Difference Between Izza (إذا) And Izz (اذ) Used In Quran
This is the general rule that I told you. Then comes its different usage which are many. A past event in the future setting and future even in the setting of the future is a common Arabis style. Then it tells a different tense. Iza takes the tense into a conditional sense, equivalent to it in English is “When” which sometimes takes present or past tense but it is still conditional. Also, it can be used in perfect tense. The same goes for Iza. If you are interested in details, you need to learn grammar and there is a list of different uses of iza and iz.