Just like the verb piacere in the present tense, piacere in other tenses takes the third-person singular and plural.
Piacere is conjugated with essere in the passato prossimo, so the past participle agrees in gender and number with the subject.
Remember that the subject is the person, place, or thing that is liked and it often follows piacere.
Here are the points to keep in mind :
In its verb forms, Piacere uses indirect object pronouns, which differ from other pronouns, such as reflexive ones. Sometimes learners get them mixed up and say “si piace,” which is incorrect, instead of “gli piace.”
Mi piace la musica (I like music)
Mi è piaciuta la musica (I liked the music)
Mi piacciono gli spaghetti.(I like spaghetti)
Mi sono piaciuti gli spaghetti (I liked spaghetti)
📌 PIACERE IN THE PAST WITH A VERB
When the subject is an action (an infinitive verb), the auxiliary essere of piacere is in the third person singular and the past participle ends in –o.
Mi piace cucinare la lasagna (I like to cook lasagna)
Mi è piaciuto cucinare la lasagna (I liked to cook lasagna)
The auxiliary and past participles always coincide with the gender and number of the pleasant object. So, if the item being liked (the object) is a feminine noun, make sure the participle agrees with the subject.
Mi è piaciuta la pasta → I liked the pasta
Mi sono piaciute le tue scarpe → I liked your shoes
It is necessary to keep in mind that no matter what tenses are used, you must always use PIACERE in the third person singular or plural.
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