1.If you don't study harder, you will fail this examination 2.If you don't remember to turn the faucet before going out, you will pay a lot of money for a water bill 3.If you don't work hard, you won't succeed 4.If we don't hurry up, we'll be late for the concert 5.If you study hard, you'll get good marks 6.If you don't study hard, you 'll fail in your final test
