Biến đổi Unless= if …….not. 1. If Andrew is not lazy, he will pass the final examination. (unless) → 2. John will not catch the train unless he runs more quickly. (If) → 3. The tree will die if it isn’t watered every day. (unless) → 4. Life won’t be very easy if we don’t earn lots of money. (unless) → 5. If you don’t practice more often, your English won’t be better. → 6. Jack will be dismissed if he doesn’t try to work harder. →