If I get lost on the way to your house, - I’ll use the GPS in my car., If there's a red sign or an error message on the computer screen, - you have a virus., You can't read the articles on the website, - if you don’t subscribe., If you click on this link, - it downloads the video for free., I'll call you from the top of the mountain, - if I get a phone signal., I only write my blog, - if I have something interesting to write about.,

ZERO and FIRST conditionals

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