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4aeaconditionals 110228122737-phpapp01

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  • 1. Conditionals Laura Beltrán
  • 2. Zero Conditionals • The zero conditional is a structure used for talking about general truths -- things which always happen under certain conditions. Following I will explain how the zero conditional is formed, and when to use it.
  • 3. The structure of a zero conditional sentence • A zero conditional sentence consists of two clauses, an "if" clause and a main clause (note that most zero conditional sentences will mean the same thing if "when" is used instead of "if"): If clause+ main clause: If you heat water to 100 degrees, it boils.
  • 4. Comma?! • If the "if" clause comes first, a comma is usually used. If the "if" clause comes second, there is no need for a comma: • main clause+ if clause Water boils if you heat it to 100 degrees. We use the same verb form in each part of a zero conditional: the simple present tense: • if clause: if +subject + simple present verb • main clause: subject + simple present verb
  • 5. Using the zero conditional • The zero conditional is used to talk about things which are always true -- scientific facts, general truths, and so on: • Example: If you cross an international date line, the time changes. • Explanation: This always happens, every time you cross a dateline. • If you go 10 meters under water, the pressure increases to two atmospheres. • Explanation: This is basically always true -- the pressure of 10 meters of water equals one atmosphere. • Phosphorus burns if you expose it to air. • Explanation: This is a scientific fact -- you can test it in a laboratory.
  • 6. Let’s Practice: • Use the conditions and results in the box to complete the phrases below. Conditions: you've got a headache, you don't wear a crash helmet, you heat it to 100 ºc, she comes home very late, you leave gates open in the country, you add sugar Results: you get pink, A dog bites, the DVD player comes on, Butter melts, it scratches you, You have more chance of being killed 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Water boils if __________________________________ If you mix red and white _________________________________ ____________________________________ if you leave it in the sun. If ____________________________________ , take an aspirin. If _____________________________________ , it tastes sweet. __________________________ if you go near its food when it's eating. If you pull a cat's tail, _______________________________ . _______________if you don't wear a seat belt. If you press this button,……………………………………………………………………………… Farmers get very angry if _______________________________________
  • 7. The First Conditional The first conditional (also called conditional type 1) is a structure used for talking about possibilities in the present or in the future. Following I will explain how the first conditional is formed, and when to use it.
  • 8. The structure of a first conditional sentence • A first conditional sentence consists of two clauses, an "if" clause and a main clause: • if clause+ main clause: If you study hard, you will pass the test.
  • 9. Comma?! • If the "if" clause comes first, a comma is usually used. If the "if" clause comes second, there is no need for a comma: • main clause+ if clause: You will pass the test if you study hard. We use different verb forms in each part of a first conditional: • if clause: if + subject + simple present verb • main clause: subject + will + verb
  • 10. Using the first conditional • The first conditional is used to talk about things which are possible in the present or the future -- things which may happen : • Example: If it's sunny, we'll go to the park. • Explanation: Maybe it will be sunny -that's possible. • Paula will be sad if Juan leaves. Explanation: Maybe Juan will leave -that's possible.