Do past tense and past participle?

Excuse me, could you please clarify something for me? I'm a bit confused about the use of past tense and past participle in English grammar. Could you explain the difference between the two and provide some examples to help me understand how they're used in sentences? I'm particularly interested in understanding how these grammatical constructs can be applied in the context of writing about cryptocurrency and finance. Thank you in advance for your help.