Rule reminder
Review the key Group 1 conjunctions: 'dopo che' (after — completed action, indicativo); 'non appena / appena' (as soon as — immediate, indicativo); 'mentre' (while — simultaneous, imperfetto); 'ogni volta che' (every time — habitual, indicativo); 'nel momento in cui' (the moment when — precise turning point, indicativo); 'una volta che' (once — condition completed, indicativo).
_____ la luce si spense, nessuno riuscì a muoversi.