Question

1. Nam can't go out because he has to study for his exam

----> If.............

2. She is lazy so she can't pass the exam

------>If...........

Answer 1

Nam did not have to study for his exam, he could go out. 

she was not lazy, she could pass the exam.

Answer 2

1 ......Nam didn't have to study for his exam, he could go out

2 ......... she wasn't lazy, she could pass the exam

Answer 3

1. Nam can't go out because he has to study for his exam

----> If Nam did not have to study for his exam, he could go out. 

2. She is lazy so she can't pass the exam

------>If she was not lazy, she could pass the exam.