Jes ja! Li estas La Ekbrilo!
words I looked up:
Jes ja = yes indeed
ekbrilo = a flash - from eki (to begin) and brili (to shine)
Can be, depends on context. It's describing how the verb is done. So "Quickly" can be used but it's really just describing that the running is happening quickly so they're "Running fast"
Yes (in principle), but "fast" does not have a -ly form (there is no fastly).
Haha welcome to English, where "fast" is an adverb while "quick" is not. Luckily in Esperanto we just have rapide.
Yes, except it can be applied to pretty much every adjective. The magic of Esperanto!
The introduction currently tells us that "kuri" is an intransitive verb, thus it never takes a direct object. I wonder how one would express running the race. If kuri is intransitive, "Ŝi kuras la kuron." must be wrong, but what is the alternative?