1st conditional sentences (if, đảo ngữ, unless)

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Rewrite: If you don't concentrate on your work, you will make silly mistakes. (Use "Unless")

Unless you concentrate on your work, you will make silly mistakes.

Rewrite: If students don't follow the safety rules in the lab, they will be punished. (Use "Unless")

Unless students follow the safety rules in the lab, they will be punished.

Rewrite: You won't understand tribal traditions if you don't study ethnology. (Use "Unless")

You won't understand tribal traditions unless you study ethnology.

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