When you use have or has plus the past participle?

Answer 1

When you use these elements you are using the present perfect tense.

Answer 2

When using "have" or "has" in combination with the past participle, you are creating present perfect tense. "Have" is used with plural pronouns (I, you, we, they), and "has" with singular pronouns (he, she, it). This construction indicates actions that started in the past and continue into the present or are relevant to the present.