If it wasn't for thelifejacket, I would havedrowned.
If it wasn't fortheirsupport, we wouldn't have beenabletocontinue.
I wouldn't be here if it weren't for Bruce.
We would not have beenabletofundtheprogramif it weren't for thegrant.
If it hadn't been for thatdoctor, myfatherprobablywouldn't havesurvived.
See alsoforpreposition(BECAUSE OF)