I/you/we/they start. He/she/it starts.
The present participle is starting.
"I've had" is in the present perfect tense. It is a combination of the present tense "I have" and the past participle "had," indicating an action that started in the past and has relevance to the present.
The verb "start" can be present tense (start, starts), past tense (started), or future tense (will start).
"It has been" is in the present perfect tense because it indicates an action that started in the past and has continued up to the present moment.
"Has been" is a present perfect tense verb form. It indicates an action that started in the past and continues into the present.
"I've always had an attitude" is in present perfect tense because it indicates a continuous action that started in the past and continues in the present.
The verb is is the present tense.
The tense of "have come" is present perfect. It indicates an action that started in the past and has relevance to the present moment, emphasizing the completion of the action of coming to believe.
The verb in the given sentence, "have understood", is in its present perfect tense. The sentence itself does not have tense, which is a property of verbs only.
There are two forms of the present perfect tense: simple present perfect (I have eaten) and progressive present perfect (I have been eating). Both forms use "have" or "has" with the past participle of the main verb to indicate an action that started in the past and has relevance to the present.
The past tense of did is did. The present tense of did is do. The future tense of did is will do.
"Has been born" is in the present perfect passive tense. It indicates an action that started in the past and has relevance to the present.
"Has been" is a present perfect tense verb phrase. It is used to indicate an action that started in the past and continues up to the present, or has just ended.