If it freezes, the roads are icy., My dog starts a fight if the other dog growls at first., If you don't know the meaning of a word, you must use a dictionary., If it is too hot during the night, you have to turn down the central heating., The glasses break if you put them in very hot water., If the lift still does not work, we have to call the mechanic., I will have a pain in my stomach if I eat too much., If I gave her a diamond ring, she would sell it., If someone rang my doorbell at 3 a.m., I would be unwilling to open the door., If he were a poor man, he would not have such a luxury car.,

Zero, First and Second Conditional

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