2. Fix the mistakes in these sentences. Explain why they're wrong: 1. If you will heat metal, it expands. → Why? 2. If I was you, I will check the wires. → Why?

Ответ:

• 1. If you heat metal, it expands. (0 conditional)
  Why? The original sentence used 'will' in the 'if' clause, which is incorrect for a zero conditional.
• 2. If I were you, I would check the wires. (2nd conditional)
  Why? The original sentence used 'was' instead of 'were' after 'If I'. Also, the main clause should use 'would' to express a hypothetical situation.