This document contains a collection of grammar rules, scientific facts, instructions, and statements using "unless". It provides 10 examples for each category, covering topics like test-taking etiquette, chemical reactions, conditional commands, and qualifications for actions. The overall purpose is to demonstrate different grammatical structures through short examples across various subject areas.

1. Grammar
Name: Natalia Narvaez, Jaime Tapia
Rules
1. If you make an error in the test, don’t make studs or erasures.
2. If you don’t understand a question, ask your teacher.
3. If you don’t know an answer in the test, don’t ask your partner.
4. Don’t cheat when you do the test.
5. Don’t chew gum when you are in class.
6. Don’t make noise if you are in the hospital.
7. If you know the answer, raise your hand.
8. If you arrive late to class, don’t knock the door.
9. Do not use an Englishdictionary whenyouwrite the test.
10. If you don’tcome to work,you mustcall an hour before toannounce it.
Scientific Facts and General Truths
1. If you cross an international date line, the time changes.
2. If it rains, the grass gets wet.
3. Wood doesn't burn if there is no air.
4. If there is no rain, the grass doesn't grow
5. Ice floats if you drop it in water.
6. Iron rusts if it gets wet.
7. If people don’t eat, they get hungry.
8. If you mix yellow and blue, you get green.
9. When you read books, you learn new things.
10. You pay higher taxes when you earn more money.
Give instructions. Imperative
1. If you drink, don’t drive.
2. Please don’t disturb me if I am asleep!
3. If you’re hungry, eat something!
4. If you visit Barcelona, look out for the spectacular architecture.
5. If unemployment is rising, people tend to stay in their present jobs.
6. If you've finished everything, go home.
7. When you go to Barbados, take plenty of sun cream.
8. When I'm working, please be quiet.
9. When I've written a new article, I run it through my spell-checker.
10. If my brother phones, tell him to meet me at the cinema.

2. Unless
1. I can’t drive unless I have my glasses.
2. You can’t drive a car unless you have a license.
3. Unless he asks you politely, refuse to do any more work on the project.
4. Unless you need more space, a small car is big enough for one person.
5. Unless you need a lot of leg-room, don't pay the extra for first class.
6. Unless I'mmistaken, that's certainly Mr Jones.
7. Unless you use high quality material, you can't build a good house.
8. Unless he gets here soon, we start the meeting without him.
9. They don't sign the contract unless we give them an additional discount
10. Unless you send your part, we give the homework.