Г166
НЕЧЕГО И ГОВОРИТЬ, что... or о ком-чём, про кого-что
collthese forms onlyimpers predic with быть«,
usu. pres и always precedes говорить)
1. it is so obvious that it does not even have to be stated: нечего и говорить, что... - needless to say
it goes without saying (that...)of course
об X-e нечего и говорить - one need hardly mention (say anything about) X
(when the person or thing in question is juxtaposed with a person or thing in the preceding context) to say nothing of Xnot to mention X.
2. sth. or s.o. is excluded altogether (as a possibility): об X-e нечего и говорить = X is out of the question
(in limited contexts) there is no question of (person Yb) doing thing X.