Final answer:
To change a conditional sentence from type 1 to type 2, we need to use the past simple tense in the if clause and the present simple tense in the main clause. For a type 3 conditional, we use the past perfect tense in the if clause and the conditional perfect form in the main clause.
Step-by-step explanation:
To change a conditional sentence from type 1 to type 2, we need to use the past simple tense in the if clause and the present simple tense in the main clause. In this case, the original sentence is "I won’t pass the exam if I don’t study hard."
To change this to a type 2 conditional, we would say "I wouldn't pass the exam if I didn't study hard." Here, we are using the past simple tense "didn't" in the if clause and the conditional form "wouldn't" in the main clause.
For a type 3 conditional, we use the past perfect tense in the if clause and the conditional perfect form in the main clause. So, the sentence would be "I wouldn't have passed the exam if I hadn't studied hard." Here, we are using the past perfect tense "hadn't studied" in the if clause and the conditional perfect form "wouldn't have passed" in the main clause.