Rewrite sentence: Simon had not expected that he would feel so weak after the...

[Con Ong Vang]

I have some trouble when rewriting this sentence:
-Simon had not expected that he would feel so weak after the operation.
=>The operation left..................................................................
My answer:" The operation left Simon an unexpected weakness"
Answer key: " The operation left Simon FEELING weaker than he had expected"
I have not ever known the structure:To leave BD V-ING.
Can you explain to me?

[Haihao]

Interesting question!

I feel your answer is still possible to mean "As a result of the operation Simon became unexpectedly week" but the original sentence contains the word 'feel'. Without omitting it, the answer key suggests "As a result of the operation Simon felt weaker than he had expected", which gives a better accordance.

[Alan]

Hi,

'Left me feeling' is really no different from other constructions like: We saw them going home/I heard her singing/We found them eating our food and so on. Your sentence:

[Molly]

The operation left Simon feeling unexpectedly weak.