PC or PS
I (know)__________ something was wrong when I (see)__________ her face.
I (know)___knew_______ something was wrong when I (see)_____saw_____ her face.
While the ship (sink)______________, the musicians (playing)__________ music on the deck.
While the ship (sink)_____sank_________, the musicians (playing)_____were playing_____ music on the deck.
seek
sought