He could not speak, he could not move from the spot where he stood.

他说不出话来，站在那里一动也不动。

youdao

He was so excited that he could not speak.; he was too excited to speak.; he was so excited that words failed him.

他太兴奋，连话都说不出来了。

《新英汉大辞典》

And he could not speak, he could not cry out.

他说不出话，他叫不出声。

youdao

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

At first, he could not speak and doctors gave him only 1% chance of survival.

BBC: Maldives journalist flees island fearing safety

Captain Steven Gerrard has given the coach his backing but he could not speak for the whole team.

BBC: Fabio Capello undaunted by England Euro 2012 pressure

He said the run-up to his appointment was a "difficult process" because he could not speak to anyone about it.

BBC: Justin Welby: There will be tears on leaving Durham