Afirmativ : S +verb To BE la past tense +verbul conjugat +ING
Ex: I was reading the lesson when the teacher came in .
Negativ: S+verbul To BE la past tense la forma negativă + verbul de conjugat +ING
Ex: They weren't looking for Sue, they were looking for her sisters .
Interogativ: verbul To BE la past tense+ S+verb de conjugat +ING
Ex: was he driving too fast when he had the accident ?