can't get to pins 8,9,10 with SD shield on Uno R3

Hi I need to use output pins 8 9 and 10, with the the SD shield mounted on my UNO R3, but these pins do not respond to input or output with the shield in place. They work fine with the shield off.
The specs for the SD Shield only mention pins 4, 10, 11 and 13 used by the SD board - why can’t I reach these other pins?
BTW pins 0 - 7 (except 4 which is used by the SD) are working fine for input/output with my sketches.
Thanks for the help