posted by rfvv .
Try hard to succeed.
(What is the part of speech of 'to succeed'? Is 'to succeed' the object of the verb 'try'? Or is 'to succeed' the adverbial phrase which modifies 'try'?)
"To succeed" is an infinitive and is used as the object of the verb, "try." It's an object because it answers "what" after the verb.