She could have become a professional dancer if she’d started earlier. Had ________________________________ , she could have become a professional dancer.

If my drama teacher hadn’t recommended me, I would have never landed that role. But _________________________________________, I would have never landed that role.

Everything should be OK provided ______________ there isn’t a power failure.

You can have my guitar for the concert ______________ long as you don’t let anyone else touch it.

There’s no point in trying to become a writer if you don’t really want to do it. There’s no point in trying to become a writer unless _____________________________________________.

They agreed to sponsor our show but only if we put their logo on the curtain. They agreed to sponsor our show on _______________ __________________________________ their logo on the curtain.

______________ for the financial help we got from the city, the exhibition would have been impossible.

______________ you wish to come to the opening night of our new production, we’d be honoured to offer you premium seats.

If any journalist wants to talk to the conductor, tell them she’s not here! Should _______________________________________ to the conductor, tell them she’s not here!

I’m going to write this novel ______________ or not anyone wants to read it.

I’ll lend you my dancing shoes ______________ condition that you clean them immediately after the show.

I wouldn’t have had the courage if I’d known in advance how difficult it was going to be. Had _________________________________________ how difficult it was going to be, I wouldn’t have had the courage.