Zero conditional MULTIFLUENT A2 The zero conditional structure is used to talk about something which is always true. It always happens, on the condition that something else happens. Example: If it rains a lot, our garden floods. Form If When Unless I you he / she / it we you they Present simple , I you he / she / it we you they Present simple Examples If you fly on a budget airline, you have to buy your own drinks. When we visit Geoff, he always cooks us a roast dinner. The zero conditional can be used with The imperative form. If you have a membership card, enter through the door on the left. Enter through the door on the left if you have a membership card. A modal verb. If the alarm goes off, we should leave the building. If it’s rainy and sunny at the same time, you can often see a rainbow. Resource: https://www.examenglish.com/gram mar/A2_zero_conditional.htm
