accompanied by
Ich habe nur nicht gegrüßt, weil du in Begleitung warst.
I didn't greet you simply because you were accompanied.
— The Garden of Sinners: Paradoxe Helix (2008)
Alle Schüler gehen nur in Begleitung eines Lehrers zu ihrem Unterricht.
All students must be accompanied by a teacher to attend their lessons.
— Harry Potter und die Kammer des Schreckens (2002)
Sie kam in Begleitung ihrer Freunde.
She came accompanied by her friends.
Er war in Begleitung seiner Frau.
He was accompanied by his wife.
Dieses Jahr sind Sie in Begleitung angereist?
Did you travel here with someone this year?
— Tatsächlich... Liebe (2003)
Aber sie war in Begleitung eines Mannes.
But she was accompanied by a man.
— In The Mood For Love (2000)