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Les phrases conditionnelles expriment des conditions et leurs conséquences. Type 0 : vérité générale — If + present simple, present simple. Ex : 'If you heat water to 100°C, it boils.' Type 1 : condition réelle dans le futur — If + present simple, will + infinitif. Ex : 'If it rains, I will stay home.' Type 2 : condition irréelle dans le présent — If + past simple, would + infinitif. Ex : 'If I were rich, I would travel the world.' (Notez 'were' pour tous les sujets au Type 2.) Type 3 : condition irréelle dans le passé — If + past perfect, would have + past participle. Ex : 'If she had studied, she would have passed.' Mixte : combine Type 2 et Type 3 — condition passée, résultat présent ou vice versa. Ex : 'If I had worked harder (past), I would be richer now (present).'
Exercice 1 : Complétez avec la forme correcte.
1. If you (heat) ice, it (melt). [Type 0]
2. If she (study) more, she (pass) the exam. [Type 1]
3. If I (be) you, I (apologize). [Type 2]
4. If they (leave) earlier, they (catch) the train. [Type 3]
Exercice 2 : Identifiez le type et justifiez.
'If he had taken medicine, he would feel better now.'
Why do we use 'were' instead of 'was' in Type 2 conditionals?
Correction
In formal and standard English grammar, 'were' is used for all subjects in the if-clause of Type 2 conditionals because it is the subjunctive mood, signaling that the condition is hypothetical or contrary to reality. 'If I were a doctor, I would help more people.' In informal speech, 'was' is sometimes used but 'were' is standard.
What is a mixed conditional and when do you use it?
Correction
A mixed conditional combines elements from Type 2 and Type 3. It is used when a past action has a present consequence (or a present state has a past consequence). Example: 'If he had saved money (past, Type 3 condition), he would be rich now (present, Type 2 result).' The past action not done affects the current situation.
What is the difference between Type 1 and Type 2 conditionals?
Correction
Type 1 refers to real or likely situations in the future: 'If it rains, I will take an umbrella' — rain is possible. Type 2 refers to unreal or improbable situations: 'If I won the lottery, I would quit school' — winning is unlikely. Type 1 uses will; Type 2 uses would.