In Eucharistic Prayer II the Vere Sanctus (Lord, you are holy indeed) is spoken by the principal celebrant alone, with hands extended.
From the Haec ergo dona (Let your Spirit come upon) to the Et supplices (May all of us who share) inclusive, all the concelebrants speak all the following together: The Haec ergo dona (Let your Spirit come upon) with hands extended toward the offerings; The Qui cum passioni (Before he was given up to death) and the Simili modo (When supper was ended) with hands joined; While speaking the words of the Lord, each extends his right hand toward the bread and toward the chalice, if this seems appropriate; as the host and the chalice are shown, however, they look toward them and afterwards bow profoundly; The Memores igitur (In memory of his death) and the Et supplices (May all of us who share) with hands extended.
The intercessions for the living, Recordare, Domine (Lord, remember your Church), and for the dead, Memento etiam fratrum nostrorum (Remember our brothers and sisters), are appropriately assigned to one or other of the concelebrants, who speaks them aloud alone, with hands extended.