Me ha marcado

[Rusty]

Originally Posted by laepelba

So is "marcado" the verb (marcadarse or something) to be conjugated? Or is the idiom require the "ha"?

Mi vida fue marcada por ....

While it is true that Spanish uses the passive voice much less frequently than English, the phrase in question isn't in the passive voice. I wrote that in red.
There is no idiomatic expression involved, either.

The verb is marcar (to mark). Me ha marcado is the indicative mood, present perfect tense of the verb marcar, with a preceding indirect object pronoun.

The model that is often used to describe the unconjugated phrase is marcarle a alguien algo. The model contains the unconjugated verb (suffixed with the default (model) indirect object pronoun le), the prepositional phrase a alguien (present only to remind the speaker to resolve ambiguity or provide emphasis with a prepositional phrase), and the subject algo (added for completeness).

To use the model, the verb needs to be conjugated into the correct mood and tense and the correct indirect object pronoun must be selected. If a subject is needed, it follows/precedes the conjugated verb. If the IOP needs clarified or emphasized, a prepositional phrase is added before or after the conjugated verb.

The present perfect tense is a compound verb, meaning there are two parts - haber + past participle. The past participle of marcar is marcado. The subject (unnamed in Poli's example) is a third person, so haber becomes ha.

If you need me to explain further, let me know!