1. Unless you study hard , you will fail the exam. => If …………………………………………………………………………….. 2. I have never visited the Stone Forest before. => This is ………………………………………………………………………. 3. The boy looks thin,...

Unless you study hard, you will fail the exam. => If you study hard, you won't fail the exam. (This rewrites the sentence using a positive conditional structure with "if" to imply the consequence of studying hard is avoiding failure.)

I have never visited the Stone Forest before. => This is my first time visiting the Stone Forest. (This sentence rephrases the idea using "first time" to indicate it's the initial visit.)

The boy looks thin, but he is very strong. => Though the boy looks thin, he is very strong. (This sentence uses "though" to connect the contrasting ideas of appearance and actual strength.)