Particles

1. Space and time may be easy in comparison to the categories of praxeology and thymology. For example, there’s starting time and ending time. “I cleaned from morning to night (i.e., 朝から夜まで).” There’s also duration. “I cleaned for 12 hours.” Space is more complex, though, with its extra dimension.
2. Some categories are such that their referent(s) can exist in both space and time. Other categories are such that their referent(s) can’t exist in space; they can only exist in time. For example: “The cat jumped onto the table.” “On the table” gives spatiality, and “jumped,” being past tense, gives temporality. However: “I was happy yesterday.” The happiness itself can’t exist in space (though of course the mind feeling the happiness can be embodied and thus exist in space); it can only exist in time.
3. One of the most important of the praxeological/thymological categories is that of the ends (of an action). For example: “I used a hammer in order to break the window.” And of the same level of importance, of course, is that of the means (of an action): “I broke the window with a hammer.”