His parents said this because they were afraid of the Jews; for the Jews had (synetetheinto | συνετέθειντο | pluperf mid ind 3 pl) already agreed (synetetheinto | συνετέθειντο | pluperf mid ind 3 pl) that if anyone should confess Jesus to be the Christ, he was to be put out of the synagogue.
Reference
John 9:22
Sequence
2