#自己学英语#

His lip quivered, his voice quavered, and he quailed.

• quiver: to tremble, used for physical movement
1. His hands quivered as he held the letter.
2. The candle flame quivered in the breeze.
3. He felt a quiver of panic.

• quaver: to tremble, used for voices, sound, or musical notes
1. His voice quavered during the speech.
2. He quavered a hesitant "hello."
3. He was so nervous that his words came out in a quaver.

• quail: to recoil in fear or lose courage
1. He quailed before the king's wrath.
2. She told him he was becoming just like his father. He quailed at the thought.