eg:
The movie is so fearful that I can't continue to watch...
nervous就是緊張不安,害怕膽怯(表演前的心情)
Don't be nervous before your examination, it's just a piece of cake
He would be nervous of going too near the wild animals
afraid就是擔心(同時也可以表達fearful的恐懼)
I am afraid of watch the fearful movie...
I am afraid that I am gonna fail this course...
ps:還有例如scare, jittery, tense, strained