a frightening dream的用法和样例：
- I can not recall once sleeping with my mother in a bed, holding her neck and being cuddled in her arms.I used to call out for my grandma when waking up at midnight from a frightening dream.
- A frightening, compulsive novel.
- It's really a frightening experience.
- Chandler: You are a frightening, frightening man.
- He spoke in a frightening manner.