I do not understand your question...
Both are similar to each other. However, foreshadowing hints at the possible outcomes in the future without any interruption in the story and using events or dialogues of characters in the present time. Flash-forward, on the other hand, is an interjected scene that takes the story forward in time. Flash-forwards are bound to happen in the story because it is showing you the future of the story, but foreshadowing is just hinting and predicting future events, so they may or may not happen.
hope this helps!
Juliet worries that the poison will kill her instead of put her to sleep, and Friar Lawrence is attempting to kill her for being sinful. She also worries that she will wake up before Romeo comes to save her, or she will die of suffocation because there is no fresh air in the tomb.
