Warrior Macro

Hello guys! looking for some help with my warrior macro.
I struggle to make one that does :
-normal bind, if shield is equipped then shield bash on my target, if no shield on (2h on) it does berserker stance
-Shift bind, if shield is equipped then shield bash on my focus, if not (2h on) it does berserker stance

this is what i came up with, but its not working :(

#showtooltip
/cast [nomod,equipped:shield] Shield Bash; Berserker Stance
/cast [modifier:shift,equipped:shield,target=focus] Shield Bash; Berserker Stance

The thing is this works perfectly fine:
/cast [equipped:shield] Shield Bash; Berserker Stance
But idk how to make the [modifier:shift,target=focus] in it to work


tell me if you have an idea! cya around :D