Does anyone know the 2nd form of BE?

The enemy attacked the headquarters. what is the action verb in the sentence?

Which best describes the suspense technique of flashback? an image, color, object, or similar is shown early in the film. it later reappears in a pivotal scene or plot point. details of the story outside of the chronological storyline are provided to the audience, often as a memory. illusions of explosions and other events are presented, often using computer-generated imagery to seem realistic. the screenwriter lets the audience know something the main character does not, usually something important to the plot.

Used for an event that has been completed before the present moment in time. simple past past perfect perfect progressive past perfect progressive