Conditional Sentences

CONDITIONAL SENTENCES
Conditional sentences have two parts : the If-Clause and the Main Clause : In the sentence : ' If you leave now, you will catch the train ','If you leave now' is the If- Clause, and 'you will catch the train.' is the Main Clause.

There are three kinds of conditional sentence: each kind contains adifferent pair of tenses. TYPE 1 - PROBABLE CONDITION The verb in the If-Clause is in the present tense; the verb in the Main Clause is in the future tense : If we playwell, we'll win. This type of sentence implies that it is quite probable that the action in the If- Clause will be performed. TYPE 2 - IMPROBABLE CONDITION The verbin the If-Clause is in the simple past tense; the verb in the Main Clause is in the conditional tense : If she cycled to work, she would feel better. There is nodifference in time between the first and the second type of conditional sentence. The second, like the first, refers to the present or future, and the past tense in itsIf-Clause is not a true past tense but a subjunctive, which indicates improbability or unreality. Type 2 is used : * to talk about an unlikely event in the presentor future If I had more time, I would go to the club with you. * to talk about an imaginary event If I were rich, I would live in Paris. * to give advice If I wereyou , I'd call the doctor.

TYPE 3 - IMPOSSIBLE CONDITION

The verb in the If-Clause is in the past perfect tense; the verb in the Main Clause is in the perfectconditional : If he had seen you he would have helped you. Here we know that the condition cannot be fulfilled because the sentence refers only to past events.