I think this is what you mean:
In the trigger editor, go new action, scroll down a little (it's close to the top) you will have a heap of 'animation' actions to choose from. some of them use animation tags, others use animation modes. 'stand' is a mode, 'work' is a tag. then, depending on which one it is and the effect you want, you pick the appropriate trigger. if you add a tag, you will have to remove it using another trigger. if you change it's mode, it will stay in that mode till something causes it to change it's mode. telling it to play it's death animation will cause it to do so until it moves or attacks or whatever. I'm sure you can figure the rest out.