bundle of nerves: 神经紧张、担惊受怕的人
To shit a brick 十分担心，非常忧虑
I/they am/are sweating bullets 非常紧张（到汗滴像子弹一样大）
Afraid of one's own shadow 风声鹤唳；草木皆兵，胆小到极点
Bated Breath 屏息地
Make your blood run cold 使不寒而栗，让我毛骨悚然
Break out in a cold sweat 捏一把冷汗
Have butterflies in one's stomach 紧张，不安
On the edge of ones seat 不是真的坐在椅子的边儿上，而是形容紧张的样子
Heart skips a beat （表示兴奋或紧张）心跳漏了一拍
Ants in your pants. 焦灼烦躁的心情

He was afraid of his own shadow because of the issue.
因为那件事情，他一直心里很有阴影，草木皆兵。
He waited with bated breath for the test results.
他屏住呼吸等待着考试的结果。
His blood ran cold when she didn't call.
她没有打电话过来，他非常地害怕。
I had butterflies in my stomach during the last minute of the basketball game.
篮球比赛的最后一分钟，我紧张地不行。
The magician had the audience on the edge of their seats by the end of the show.
知道表演的最后一秒，那个魔术师都紧扣着观众的心弦。
You shouldn't have done that. My heart skipped a beat.
你不该那么做的，我紧张地心跳都漏了一拍。