Question

1. Shut the window , otherwise it’ll get too cold in here.
If_________________________________________________________________
2. Be careful . Otherwise , you’ll break the TV.
If_________________________________________________________________
3. Opening all the windows is the best way to get some fresh air.
If_________________________________________________________________
4. Listening to the teachers carefully is the best way to understand the lessons.
If _________________________________________________________
5. If you don’t work hard ,you will fail the exam.
Unless ______________________________________________________________
6. If you aren’t careful , you’ll break the vase.
Unless___________________________________________________________
7. If he doesn’t hurry , he’ll miss the bus.
Unless___________________________________________________________
8. Unless she gets up early, she will be late for school.
Unless_________________________________________________________

Answer 1

1. Shut the window , otherwise it’ll get too cold in here.
If_____you don't shut the window, it’ll get too cold in here. ____________________________________________________________
2. Be careful . Otherwise , you’ll break the TV.
If______you aren't careful, you’ll break the TV ___________________________________________________________
3. Opening all the windows is the best way to get some fresh air.
If____you open all the windows, you will get some fresh air_____________________________________________________________
4. Listening to the teachers carefully is the best way to understand the lessons.
If _____you listen to the teachers carefully, you will understand the lessons. ____________________________________________________
5. If you don’t work hard ,you will fail the exam. 
Unless ______you work hard,you will fail the exam. ________________________________________________________
6. If you aren’t careful , you’ll break the vase.
Unless___you are careful , you’ll break the vase. ________________________________________________________
7. If he doesn’t hurry , he’ll miss the bus.
Unless__he hurries, he’ll miss the bus _________________________________________________________
8. Unless she gets up early, she will be late for school.

If__she doesn't get up early, she will be late for school._______________________________________________________

Answer 2

1. Shut the window , otherwise it’ll get too cold in here.
If you don't shut the window, it'll get too cold in here.
2. Be careful . Otherwise , you’ll break the TV.
If you aren't careful, you'll break the TV.
3. Opening all the windows is the best way to get some fresh air.
If you open all the windows, you will get some fresh air.
4. Listening to the teachers carefully is the best way to understand the lessons.
If you listen to the teachers carefully, you will understand the lessons.
5. If you don’t work hard ,you will fail the exam.
Unless you work hard, you will fail the exam.  
6. If you aren’t careful , you’ll break the vase.
Unless you are careful, you'll break the vase.
7. If he doesn’t hurry , he’ll miss the bus.
Unless he hurries, he'll miss the bus.
8. Unless she gets up early, she will be late for school.
If she doesn't get up early, she will be late for school.