Breakdown of ¿Participaste en ese desfile?
en
in / on / by (means of transport) / about (after pensar)
ese
that (m.sg., also esa, esos, esas, eso)
participar
to participate
el desfile
the parade
Questions & Answers about ¿Participaste en ese desfile?
How does the ending of participaste show that it's in the past tense?
Why isn't the word tú (you) in this sentence?
In Spanish, the verb ending usually gives away who is doing the action. Because the -aste ending is only ever used for the tú form in this past tense, adding the word tú isn't necessary unless you really want to add emphasis.
Why is it ese desfile and not eso desfile?
The word desfile (parade) is a masculine noun. When you want to say 'that' directly in front of a masculine singular noun, you must use ese. The word eso is a neutral word used for abstract ideas or unnamed situations, and it is never placed directly before a noun.