Question on 'her hands skaking'

[learning54]

Hi teachers,
I have this sentence in one of my books, 'She opened it, her hands shaking'.
I just don't understand why it doesn't say 'She opened it, her hands were shaking'.
Could you tell me why?

Thanks in advance

[bhaisahab]

Hi teachers,
I have this sentence in one of my books, 'She opened it, her hands shaking'.
I just don't understand why it doesn't say 'She opened it, her hands were shaking'.
Could you tell me why?

Thanks in advance

"Her hands shaking" describes her when she opened it. It's not unusual.

[Raymott]

Hi teachers,
I have this sentence in one of my books, 'She opened it, her hands shaking'.
I just don't understand why it doesn't say 'She opened it, her hands were shaking'.
Could you tell me why?

Thanks in advance

It means "Her hands were shaking while she opened it."; "[With] her hands shaking, she opened it." "She opened it, [with] her hands shaking."
What you've written is two sentences joined by a comma. You can't do that.

[learning54]

It means "Her hands were shaking while she opened it."; "[With] her hands shaking, she opened it." "She opened it, [with] her hands shaking."
What you've written is two sentences joined by a comma. You can't do that.

Hi Raymott,
Thank you for your reply. But it's not my sentence, it is from a book by Cambridge English Readers at Intermediate Level.
That's why I've asked. I understood the meaning, but not the sentence. For me the word 'were' is missing.

[learning54]

"Her hands shaking" describes her when she opened it. It's not unusual.

Hi,
Thank you very much for your reply. As I've told Raymott, for me the word 'were' is missing.

[Raymott]

Hi Raymott,
Thank you for your reply. But it's not my sentence, it is from a book by Cambridge English Readers at Intermediate Level.
That's why I've asked. I understood the meaning, but not the sentence. For me the word 'were' is missing.

No, your suggested "sentence":

'She opened it, her hands were shaking' is not a sentence.

[learning54]

No, your suggested "sentence":

'She opened it, her hands were shaking' is not a sentence.

Hi Raymott,
Thank you for your reply. Could you tell me what it is please?