True, There are 4 types of conditional sentences, 0 conditional sentences talk about repetetive actions, which are facts or laws, There are some ways to mean "if", 1 conditional sentences show what will probably happen under certain circumstances, False, In 1 conditional sentences you can only use "will" in the second clause, "Unless" is the same as "if", In 2 conditional sentences we use Present Simple to talk about imaginary situations, All types of conditional sentences are used to talk about present or future situations

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