I would have gone to the party, but for the fact that I was feeling sick.

But for the storm, I would have arrived earlier.

The pheasant would not be shot but for its cries.

I would have failed but for his kind help.

But for his help, I might fail.

I would have failed but for his help.

But for his help, your success would be impossible.

You would have failed but for his help.

But for his timely rescue, I would have drowned.

She would have failed but for his help.