Adding emphasis

[Ksenia]

Hello.

Exercise:
Rewrite the underlined sections of these sentences to change the emphasis, starting with the words given.

1 He didn't contribute to the meeting until the end.
Only at the end he contributed to the meeting. (I highlighted my answer in blue.)
(Right answer: Only at the end did he contribute to the meeting.)

Is my answer completely wrong?

Thank you.

 

[bhaisahab]

Yes, your answer is completely wrong.

 

[Ksenia]

Would you be so kind as to explain me why is it wrong?

 

[Matthew Wai]

'When only after, only if, only in this way etc. are placed at the beginning of the sentence for rhetorical effect, the subject and auxiliary are inverted'── quoted from http://grammaring.com/only-after-only-if-only-in-this-way-etc-not-until