a partecipare al suo matrimonio

to attend his/her wedding

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phrase Rare #36,569
to attend his/her wedding Used after an invitation or a verb of asking. In natural English, "attend his/her wedding" is more idiomatic than "participate in his/her wedding."
IT: Lei mi ha invitata a partecipare al suo matrimonio.
EN: She invited me to attend her wedding.

Lui mi ha invitato a partecipare al suo matrimonio.

He invited me to attend his wedding.

Lui mi ha invitata a partecipare al suo matrimonio.

He invited me to attend his wedding.

Lei mi ha invitata a partecipare al suo matrimonio.

She invited me to attend her wedding.

Lei mi ha invitato a partecipare al suo matrimonio.

She invited me to attend her wedding.