Is Went an Adjective?

Yes, 'went' is the preterite (or simple past tense) of the verb 'to go'. It is an irregular verb. The past participle of 'to go' is 'gone'.

Is gone a verb or adjective?

As detailed above, 'gone' can be a verb, a preposition or an adjective. Preposition usage: You'd better hurry up, it's gone four o'clock. Adjective usage: Are they gone already? Adjective usage: The days of my youth are gone.

Is went a form of be?

The verb go is an irregular verb in the English language (see English irregular verbs). It has a wide range of uses; its basic meaning is "to move from one place to another". Apart from the copular verb be, the verb go is the only English verb to have a suppletive past tense, namely went.