[Red5]

Originally Posted by navi tasan

Is this sentence correct:
1-The monument was unveiled earlier Thursday despite efforts by certain officials to stop it.

The monument was unveiled earlier on Thursday despite efforts by certain officials to stop it.

Originally Posted by navi tasan

If it is, then the "it" replaces "the unveiling of the monument", does it not?

I think so, yes.

Originally Posted by navi tasan

Could one say:
2-John was wounded in spite of my efforts to prevent it.
or
3-John was wounded in spite of my efforts to prevent that.
or
4-John was wounded in spite of my efforts to prevent him.

I'd suggest that John was wounded in spite of my efforts to prevent it is correct.