"Did he try?"
Translation:Il a essayé ?
To Nikki & Custom,
"Did" is not translated at all. In English, it's a dummy word used to compose certain verb forms. (Usually question, negation, emphatical, etc.)
French never does this. The auxiliary verbs will only be avoir or être.
In this sentence it's avoir:
Il a essayé ? > He has tried? OR He tried? OR Did he try?