Conditionals 1 If the temperature (fall) below 0 degrees, water (freeze). 2 He (stay) for lunch, if she (ask) him. 3 If you (be) thirsty, you (can/make) some fresh lemonade. 4 If he (finish) his work today, he (take) part in the competitions. 5 If there (be) no gravity, objects (not/fall).