passed / past
The verb versus the adjective, noun, and preposition.
Passed is the past tense and past participle of pass: She passed the truck. The bill was passed. Past is the adjective, the noun, or the preposition: the past week, in the past, past the gate. Do not write past for the verb.
Examples
UseHe passed the exit.
UseDrive past the exit.
AvoidHe past the exit.