The series of verbs that have irregular conjugation in the present perfect tense is 'morir, escribir, hacer'.
The Spanish Irregular Verbs are different verbs that are characterized due they do not follow a regular conjugation.
For example, the Spanish verb 'haber' is an irregular verb (in English it means “to be/to have”).
In conclusion, the series of verbs that have irregular conjugation in the present perfect tense is 'morir, escribir, hacer'.
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