1.Viết câu điều kiện loại 1: Leave home early or you will miss the flight *
2.Viết câu điều kiện loại 1: Don’t be outside in the rain or you will get wet. *
3.Viết câu điều kiện loại 1: Walk faster or you will miss the bus. *
4.Viết câu điều kiện loại 1: Pay or they will cut off the electricity. *
5.Viết câu điều kiện loại 1: Don’t touch that wire or you may get an electric shock. *
 

1.Chuyển câu từ "if" sang "unless": If she doesn't work harder, she will fail the exam.
2.Chuyển câu từ "unless" sang "if": Unless my sister is mistaken, she works for Nike.
3.Chuyển câu từ "if" sang "unless: Linda wouldn't have called him if she hadn't come back. *
4.Chuyển câu từ "if" sang "unless: I’ll call the teacher if you don’t leave me alone. *
5.Viết câu điều kiện loại 1: Get up early or you will be late for school. *

 

xercise 02: Rewrite the following sentences as example (3 ways).
Example. Keep quiet or you’ll wake the baby up.
(+) (+)
 If you keep quiet, you won’t wake the baby up.
 If you don’t keep quiet, you will wake the baby up.
 Unless you keep quiet, you will wake the baby up.
1. Hurry up or we will be late for the exam.
2. Don’t do the exam test carelessly or you will get a bad mark.
3. Don’t be talkative in class or you will be out.
4. Water the small trees or they will die.
5. Be careful or you’ll cut yourself with that knife.
6. Stop talking or you will wake the children up.
7. Stop talking or you won’t understand the lesson.
8. Don’t touch that wire or you may get an electric shock.
9. Study hard or you won’t pass the exam.
10. Don’t be impatient or you will make mistakes.

Exercise 01: Rewrite the sentence with “if/unless”.
1. Unless my sister is mistaken, she works for Nike.
2. Her friend is going to leave his job unless he gets a pay rise.
3. Unless she listens carefully, she won’t understand what we spoke.
4. If his sister doesn’t come over, he will listen to a good song.
5. If Jane finishes her work before 6 pm, she will dine out with her friends.
6. My brother won’t go travelling this summer if he doesn’t find a companion.
7. It is not easy to do these exercises unless you listen attentively to the teacher.
8. If Jim doesn’t submit his essay before Tuesday, he will be punished by the teacher.
9. Mai will be here tomorrow unless her flight is delayed.
10. Linda wouldn’t have called him if she hadn’t come back.
 

Exercise 02: Match the type of pollution with its relevant words/phrases.