The document discusses the first conditional, which is used to talk about possibilities in the present or future. It notes that the first conditional uses an "if clause" with a present simple verb, followed by a "main clause" with "will", "won't", or "might" to indicate the result. Examples are provided such as "If we have time, we'll go to the cinema" and "They might go out tonight if they don't have homework." The word "unless" can also be used in conditional sentences to mean "if...not", and examples of this are given. Finally, it notes that conditional sentences can have the main clause come first or the if/unless clause come first, separated by a