what about zuhr and isha kay 4 sunnat before farz?
**yes..its like:
fajr = 2 sunna; 2 farz
zuhr = 4 sunna, 4 farz, 2 sunna
'asr = 4 farz
maGhrib = 3 farz; 2 sunna
'ishaa~ = 4 farz; 2 sunna; 3 witr
some sunna have more importance than others for instance 2 rakat sunna at fajr is like farz almost...u've to say it b4 u say the farz...thats why in masaajid, the imaam recites long suras in order for late comers to finish their 2 rakat sunna. if u r travelling or missing a prayer coz u r late for whatever reason u just say the farz and skip the sunna.
witr is also just like farz...during ramadhan, witr is done in jamaa'a [congregation] Arabs do like to delay until tahajjud. u can say right after the 'ishaa~ prayer or wait untill tahajjud, if u do that. its better to do it after ishaa~ coz u dun wanna take a chance and sleep over and miss the witr.
wallaho 'aalam bissawaab**