Conditionals 0& 1 1. if you (not /stay) at home, you (get) worse. 2. if i (heve) a headache, i (take) an aspirin. 3. watter (turn) to ice if the temperature (drop) below 0. 4. you (catch) a cold if you (not/ wear) your jacket. 5. if you (boil) water, it (evaporate). 6. all metals (expand) if you (heat) them.