Sylvie could not speak. She could not tell the heron's secret and give its life away.

VOA: special.2010.04.03

I enjoyed it. It was nice, but I could not speak eloquently about the pieces like everyone else.

我很喜欢现代艺术，挺好的。但是我不能像其他人那样流利地说出艺术品的所以然来。

喜欢毕加索吗？ - SpeakingMax英语口语达人

He could not speak. Soldiers removed their hats and watched silently as Lee rode past.

VOA: special.2009.12.24

But tears filled his eyes and he could not speak.

VOA: special.2010.07.31